i have many category

i can't select last category

I have a vertical scroll bar for category, LOTS of categories (I can only see about 1/2 at a time) so use it all the time
on win7 pro 64

Same on Win x64 8.1, works ok for me. v2.52
Double check your settings for full-height category window maybe?

if i have 50 categorys maybe can't select some botton position category

when add new torrent and select category

and

change category