Trouble opening recent projects

Greetings all.... Been having trouble opening Sonar Plat projects. I can open some bundle file back ups but the projects just won't load. It acts like it's going to then just goes to the spinning circle icon & stops. I updated to Win 10 in Oct. & everything was okay for awhile. I tried rolling back some Win.10 updates but no luck.
I do have all Sonar Plat updates installed & haven't tried rolling back any of those yet.
I couldn't find any other threads so I thought I'd try here for some ideas before doing anything else, thanks.
Win 10, HP Z600 with Intel xeon dual quad cores @ 2.93 ghz, 2 Lynx L22's with LS Adat, Lucid 88192