If I were you, I would be way more worried your P3D takes 15-20 minutes to load, which seems to indicate problems way more serious.
For example, configuring the antivirus to exclude the whole simulator folder and any other folder that contains sceneries ( possibly in different drives ), might help and, if you also add the whole Addon Manager folder to the antivirus Exclusions, that might help fixing any issues with our sceneries.
About CYVR, if it's listed as Active, it seem to indicate the software is working correctly but, perhaps an error happened. First, I assume you do have GSX working normally at other places ? None of our sceneries work without GSX ( of course it's free to use there ) so, first thing to check if it's GSX is working.