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Version history

The latest version is always available from your account . You can also download it from the links below.

Version 3.6.5

Release Date: 3/15/2024

Bug Fixes

  • fixed a problem with some Google Group Auth configurations

Download Version 3.6.5

Version 3.6.4

Release Date: 11/9/2023

Bug Fixes

  • FileManager now shows the correct FileMaker Server HTTP root directory on windows and linux. Mac was not affected.

Download Version 3.6.4

Version 3.6.3

Release Date: 09/18/2023

** Required for FileMaker Server versions after 20.1.x.x


  • improved error handling for Google Group Auth
  • improved FileMaker Server preference parsing.

Download Version 3.6.3

Version 3.6.2

Release Date: 08/03/2023


  • improved error message when clones could not be made during a migration.
  • improved S3 Offsite Connection Test
  • improved caching of metadata

Download Version 3.6.2

Version 3.6.1

Release Date: 5/26/2023

This is not a critical release

Bug fixes

  • Fixed an issue with the new redirect feature. This resolves any problems users may have encountered due to malfunctioning redirects.

Download Version 3.6.1

Version 3.6.0

Release Date: 05/23/2023

  • You do not need to upgrade to this version unless you need the new features.
  • This version is compatible with FileMaker/Claris Server 19.4 and later.

New Features

  • Redirect HTTP callbacks to FMP URL, allowing for OAuth callbacks and other use cases. Learn more
  • Added support for Ubuntu 22 Arm.

Download Version 3.6.0

Version 3.5.6

Release Date: 5/5/2023

New Features

  • fixed problem that caused copies to failin in some conditions

Download Version 3.5.6

Version 3.5.3

Release Date: 4/25/2023

New Features

  • Added support for FileMaker Server 2023
  • Copies are now made in the default backup directory

Download Version 3.5.3

Version 3.5.0

Release Date: 2/6/2023

New Features

  • added support for an upcoming secret feature :-)


  • fixed an issue with Google OAuth

Download Version 3.5.0

Version 3.4.9

Release Date: 12/1/2022

FileMaker Server 19.6 compatibility

Otto now supports FileMaker 19.6's new clone only fast clone process.


  • fixed an issue caused by a beahvior change of the fmsadmin command line tool in the final FileMaker Server 19.6 release

Download Version 3.4.9

Version 3.4.7


You should not use this version. It has an issue with the latest FileMaker server 19.6. This was fixed in version 3.4.9 above.

Release Date: 11/15/2022


  • fixed an issue preventing the API Key toggle from working on clean installs. Upgrades were not effected.

Version 3.4.4

Release Date: 09/26/2022

New Features

  • Support For Claris Server


  • fixed a bug in the linux version that prevented Otto from running

Download Version 3.4.4

Version 3.4.3

Release Date: 09/24/2022

New Features

  • Updated Data Migration Tool to 19.5.4
  • Added support for future versions of FileMaker server
  • Added support for scoped Admin API Keys for FileMaker Server Admin API
  • Added support for scoped Admin API Keys for the Otto Developer API

Download Version 3.4.3

Version 3.3.1

Release Date: 07/19/2022

New Features

  • Updated Data Migration Tool to 19.5.2

Download Version 3.3.1

Version 3.3.0

Release Date: 06/21/2022


FileMaker Server 19.5 is required for Otto 3.3.0 and vice versa.


A new version of Migrator.fmp12 is NOT required for this update

New Features

  • Support For FileMaker Server 19.5
  • Support for Ubuntu 20
  • Config folder now available in Otto Sever FileManager
  • Support for Google Groups Oauth with Custom OAuth


  • Various typos

Download Version 3.3.0

Version 3.2.0

Release Date: 03/14/2022

  • improved error messages when migrations fail.
  • All installer downloads are now packaged in a zip archive with PEASE-READ-FIRST.txt.
  • installing passphrase process will only get the first line of the file now, avoiding extra returns or lines.

New Features

  • Added two new folders to File Manager, and enabled uploading. Learn more...
    • FMS Docs - the document directory.
    • FMS HTTP - docs the FileMaker Server HTTP root.
  • Added Slack Notifications to Migrations. Learn more...

Download Version 3.2.0

Version 3.1.1

Release Date: 02/14/2022

  • Previously, if a file was not open on the source server, and a migration requested that file, the error just said '409 conflict'. Now the message will clearly state what the problem was that caused the conflict.
  • Linux version of the DataMigration tool was updated to 19.4.2. FileMaker Server 19.4.2 on Linux is required for this version of Otto.

New feature

  • A new 'action' was added to the api/otto endpoint. The "check-other-server" action will let you test if a server can connect to another otto server. This will be used in a future version of Migrator.fmp12. Learn more...

Version 3.0.6

Release Date: 12/29/2021 Fixed

  • fixed and issue introduced in 3.0.5 that could cause the Web Console to not load properly. This only occured with fresh installs. Upgrading to 3.0.6 didn't cause the problem.

Version 3.0.5

Release Date: 12/24/2021


  • Added supprt for new Migration options to the Migration API. Note. Migrator.fmp12 v2.2.6 doesn't have have these exposed yet.
    • -reevaluate
    • -rebuildindexes
  • Allow empty webhook body with a query string.
  • Added a restart endpoint to the API.
  • Added "Restart" Button to the Otto Web Console home page.

Version 3.0.4

An internal build, that was never released.

Version 3.0.3

Release Date: 12/10/2021


  • Migration Error - Large Migrations could fail due to a change in the Data Migration Tool's output


  • Webhook Receiver can now handle plain/text

Version 3.0.2

Release Date: 11/19/2021


  • upgraded installer
  • upgraded Data Migrator Tool to 19.4.1

Version 3.0.1

Release Date: 11/4/2021

New Features:


  • Migration speed improved by as much as 20%.
  • Single disk configurations need 30% less space.
  • Better coordination when doing multi-file migrations.
  • Upgrades to the latest FMDataMigrator file.
  • Lots of other minor improvements and bug fixes.

Version 2.5.9

Release Date: 1/14/2021


  • Fixes installer failure on Windows.

Version 2.5.8

Release Date: 1/22/2021


  • Support for Wasabi S3.
  • No longer requires FMS_HOME environment variable.

Version 2.5.6

Release Date: 11/1/2020


  • Updated Data Migration Tool for FileMaker version 19.1.3.

Version 2.5.5

Release Date: 9/21/2020


  • Fixed issue with servers using languages other than English. (Note: If you are on an English language server, you probably do not need this version.)

Version 2.5.4

Release Date: 9/2/2020


  • Improvements to large file migration and error messages.

Version 2.1.9

Release Date: 10/4/2019


  • Upgraded FMDataMigrator to version 18.0.2.

Version 2.1.8

Release Date: 9/29/2019


  • Fixed an issue with -ignore accounts option not working.
  • Fixed an issue on the Mac where not setting the password would cause a 500 error.

Version 2.1.7

Release Date: 8/2/2019


  • Fixed a bug with the app installer.
  • Improved the migration dialog.

Version 2.1.6

Release Date: 8/2/2019


  • Allows app store installer to work with the free version.

Version 2.1.5

Release Date: 8/2/2019


  • Added several new features: the App Installer, App Store, and a button to launch the FMServer Admin Console to the header.


  • Corrected varios typos.
  • Fixed an issue which prevented files from opening if a migration was very fast.

Version 2.0.4​

Release Date: 7/17/2019


  • Fixed a regression in 2.0.3.
  • Updated logos.

Version 2.0.3​

Release Date: 7/17/2019


  • Fixed an issue that caused some passwords to be viewable when a migration failed.

Version 2.0.2​

Release Date: July 1, 2019


  • Added a major new feature: Offsite Backups to Amazon S3, which schedules backups to be sent to AWS S3 for offsite long term storage.


  • Various bug fixes and performance improvements.

Version 1.7.0​

Release date: 3/18/2019


  • Automatically removes old migration backups to preserve space. Otto will now only keep the last five Migrations Backups. These were intended to restore a migration not to keep as additional backups. It will keep the last five backups. This can be overridden. Contact Support for information about how to change the number of backups to keep.
  • Automatically removes old SavedFolders to preserve space. Same behavior as above.


  • Corrected various typos in the UI.
  • Improved the process for making clones.

Version 1.6.3​

Release date: 3/6/2019


  • Otto Server no longer becomes unresponsive when a data migration is underway.