Icon size OK on PSE 2 but too small on PSE 10. However I decidied to uninstall and then renstall PSE 10, the small icon size remains and I now have a further problem: I get the PSE 10 screen OK but as soon as I click File the whole PSE 10 disappears. Re loading it just causes a repeat.
Today, August 27 2020, I have reinstalled PSE10 and it now works ok except that icon size remains too small. Jeff Arola advised contacting Support Community.