I see several other threads about issues with the help system. My problem seems to be different from those: when I press F1, nothing seems to happen. In Process Explorer I can see tchelp.exe start and it uses about 12.5% CPU as long as I let it run - apparently it maxes out one logical processor on an i7 CPU - but the help window never appears. However, if I use Help from the top menu the window opens and tchelp.exe doesn't use more than about 1% CPU, so there is kind of a work-around but it isn't context-sensitive. I am running version 20.11.36 x64 on Win 10 x64.