Migrate Database from V15 to V20

[Patch]

See

Old versions of manager files: are they always readable?

Currently Manager includes upgrade script supporting versions 5 years back. However, even if you happen to have a database outside of the upgrade window, you can always download slightly older version of Manager and then the latest.

And

Business database not valid, desktop version on Windows 10

Here is the solution. Install version 20.9.89 which will still allow you to import this old database format and will convert to SQLite format. Release Manager 20.9.89 · Manager-io/Manager.msi · GitHub Once you’ve done that, you can upgrade to the latest version.