signing in to premiere elements 2020 in windows 10

I have just updated my Windows 10 system successfully, but now Premiere Elements won't allow me to sign in. I have also noticed other irregularities since updating Windows 10. Any suggestions on what to do to fix this problem? I have read other posts where the same problem seems to exist, but I have not gotten a sufficient or understandable explanation of what is causing this problem, or how to fix it.