There were A LOT of issues with the change that kept me away for the last year or so

Besides ease of use and crash related bugs, are there other issues you could elaborate on? There's not much to go on for anyone to assist you in your decision... just saying.

Is iStripper easier to use now or does it still have a steep learning curve to use?

Depends on what you're trying to do. For the most part, I think most people can get by with the current UI's setup without too many ease of use concerns (not including bugs and bug-related stuff). I personally don't run into most of the issues that other people have, though I still see some (randomly ***** downloads, demo cards auto downloading for no particular reason, etc.).

If you want to get a bit more involved, it may get a little tricky (judging by the number of help posts for things outside the typical user scope).

Any major bugs that will make it crash after downloading?

Not that I know of. I think I've had maximum 2 client crashes in the last 12 months that were unrelated to downloading.