Import Business Problem

[Patch]

See and follow the instructions in this post

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. https://github.com/Manager-io/Manager.msi/releases/tag/20.9.89 Once you’ve done that, you can upgrade to the latest version.