Latest version downloaded today can't open older project files

I have project files created with version 3.3.12 that don’t open with the latest version (3.3.17 which has the digital signature). There is a message dialog saying that the incompatibility will be fixed in the next minor release. Does this sound right? If so, is there an update coming soon very soon? I would prefer not to downgrade to the older version to keep working.

Thanks,

Mre