CMS 10 PE Plus not working

I have a trial CMS 10 PE Plus running on one PC and it works fine.

(1) Purchase CMS 10 PE Plus and installed it on another PC (4-10-2021). order ID 161809981710808
tool palettes commands are not working and the same commands will not work in menu at top of screen. I can not click on them and install in dwg.
Should I uninstall and reinstall the software?? If so Instructions please.

(2) The software I purchased states 1 user 2 PC's
Can I also activate the trial version? I am the only user. One PC is used when at office, the other is used when I am on job site

I need to get a PC going while I try to fix the other PC's CMS software.

Thanks for your help!