eraser tool erasing too much/widely in ps elements 8

My dear old PackardBell gave up and I reinstalled PSE8 Elements on my new ACER XC1660 (that one with a really loud CPU-fan haha). Screen: Philips 276E via HDMI (no other options available, btw bugging in stand by mode a lot) .. however: I purchased the latest PSE 2022 yesterday, but I didn't feel comfy with it. PSE8 was better for me. So I installed it (via a external CD-driver) and very soon I realized I was trapped in the stoneage. Eraser tool was erasing out of its borders! One of the most important tools for me, to be able to gently erase on the outsides of new layers.  I change the DPI in .exe and all that, but then the icons become small again. Should I just relax, take a deep breath, enjoy and get used to the new PSE22, or is there anything I can do to fix this?!

["PS" changed to "PSE" by moderator for clarity.]