pt 2

Ive had an older version of postgresql and pgadmin installed on my pc for about 4 years, as i was practicing it a bit back than. trying to get back into it and i figure i needed to update everything. after doing so it will not open and gives me this error (picture below). i've been scouring google and forums trying to troubleshoot and fix things but im all over the place and im not sure if i even have the right files/values. i've uninstalled and reinstalled version 15 of PGSQL and v7.5 and 7.4 which i tried recently. same issue.