Manager does not want to import my old database

[Patch]

See

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.

And

Opening old files in new version

All versions are available at github. To browse versions see: Windows Releases · Manager-io/Manager.msi · GitHub Apple Releases · Manager-io/Manager.dmg · GitHub Linux Releases · Manager-io/Manager.AppImage · GitHub For v20.9.89, the last version which converts old data files to SQLite database see: Windows Release Manager 20.9.89 · Manager-io/Manager.msi · GitHub Apple Release Manager 20.9.89 · Manager-io/Manager.dmg · GitHub Linux Release 20.9.89 · Manager-io/Manager.AppImage · Git…