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I just downloaded and installed Paratext 9.5.110.1 and Windows 11. When I opened Paratext 9.5.110.1 for the first time, Windows blocked ParatextChecks.dll (and showed these errors):
I restarted my computer, and Paratext opened just fine.
You can check if it's enabled by looking at Settings > Privacy & Security > Windows Security > App & browser control > Smart App Control settings. From some quick internet searching, it sounds like this "feature" might be enabled by-default now.