Old theme overlaps new theme

This is beyond stupid.

Updated from version 7.8 with Suite 7 theme to version 7.10 which only allows Suite P theme.

Ok. I get it. I’ve been coding for 40 years, I understand the need to keep things concise and simple.

What I don’t understand is the stupidity of the upgrade process that does not clean out the old code and clear caches, etc.

WHY DOES THE OLD SUITE 7 THEME OVERLAY THE SUITE P THEME ???

And why do I even have to open this new topic to get help with what should be a simple upgrade process?

Please tell me how to address this idiotic problem.

Issue resolved -

Updated Folder permissions to 755 for all folders, and issues has resolved.

Very frustrating, but at least it is fixed.