You can select a lot of entries and then batch change to uncleared. BUT it sounds like the program is corrupted. I have heard of this on these boards. What OS (I have only heard of this with windows) and what version of MD are you using?
@dwg. Thanks for that. Since I am still running El Capitan I haven't checked that minimum version. It would be nice if there was a table.
The App store only lists 2020.1 which will work but requires and upgrade. If you do decide to purchase the upgrade, you should purchase it directly from Infinite Kind since that allows more control over versions.
The App store is supposed to allow redownload of previously purchased software. You can try to "compress" the App and then delete it leaving the .zip file. Then go to the App store and look under purchased items and re-download the app.
If that doesn't work, just expand the zip file and all is back.
(Not IK support)
@sth I do keep a little table, it only has one Operating System on it as this stage.
I'm not expecting TiK to provide such a table anytime soon, it has been suggested that version requirements should be published but that suggestion has not gone anywhere. The version information is a little obscure in that the only place I have largely seen it is in the change log.