one thing, you can also get shimeji from ko-fi! search "(character name) shimeji ko-fi" and click the one u like
use ko-fi instead, thats what i always use for my shimeji (they should all be mostly free)
right click (if ur using a pc) and click dismiss
click "shimija-qt.exe" and if it says you have to extract it, do so and ittl open the file and click "shimija-qt.exe" again and there
or you can find free shimeji on ko-fi
go to ko-fi and search shimeji and they should pop up and most of them are free. hope this helps!