Paintstormstudio.com

I'm on a mac and there's only one font option in the text tool (a basic arial). I've tried downloading new custom fonts but they still don't show up in paint storm and none of the other fonts on my mac show up. Is there something specific I should be doing, or some sort of permissions I need to allow to get the fonts into paint storm?

Yes, it is. This issue will be fixed in the next version.
Why did it happen? Old MAC font folder was /Library/Fonts/ but now it's in /System/Library/Fonts
You can manually copy required fonts into /Library/Fonts/ until update will be released.