> Some tool windows don't seem to work/display properly
> and it tends to lock up on me while experimenting.

There may be some peculiarities running ImageFX v4.5 Studio on MorphOS that are described in other comments within the thread already linked to in comment #2, including potential remedies:

https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=7758&forum=9&start=22

Take special note of cecilia's comments.