Can't Replace Picture and Demon Possessed Fonts Sizes

This use to be my favorite program for creating graphics, but with the latest updates, I can't seem to do almost anything. Case in point--I go to replace the photo in the template (the real reason to use this program) on desktop on my safari browser and nothing pops up, just a blank box. I just sat there waiting for things to upload--and they never did. So went to change the text--it was way to big so I went to change the font's size and then it just started to randomly decrease its size to size 1. So I hit the number and selected 30. I hit enter and then it did the whole decrease to size 1 one again.