This will probably get moved to the VGG domain, as that's where the powers that be prefer app-related questions be posted.
As for your question, are you sure the buttons are actually locked? I think they're deactivated by default, you just have to click the button to toggle that set on. If it really is locked, try going to the in-app store and clicking the restore purchases button. If that doesn't work (and storm of souls is shown as owned), try uninstalling and reinstalling.
That makes sense. I wasn't sure what the app-related etiquette was.
I tried restoring purchases, but I'll try uninstalling later today and see how that works. Thanks!