bbrollier,
Click on Help, click on Automatically check for updates to uncheck that option.
Then click on Help, Check for Updates, click the link to download the update. Once it is downloaded, close Paratext, apply the update you just downloaded manually.
You can then click on Help, Automatically check for updates again so you automatically get them in the future.
The message you see will no longer appear. There have been a bunch of updates to 7.5 since .29.
anon291708