I just updated to Full Feature L10.
I had L9 running when I upgraded on the website and it started downloading updates. Once it looked like it might be done I closed the program, waited a few minutes and tried to launch.
Now i get the new splash screen followed by the traditional "preparing your library" screen which runs for 3 or 4 minutes and then it just disappears. I have repeated this process at least 5 times, restarted my computer, cleared space from applicable drives and still have the same problem.
My PC should not be struggling as its only weak point is in available space. tho I have at least 20 GB on one drive and 40 on the other available.
CPU is a Ryzen 5 with 16Gb or RAM