Dammit, version 1.0.2, is currently EXTREMELY unstable on 10.8.2 Mountain Lion.
I'm not sure if this has been the case on previous OS's, however, currently Dammit is literally un-usable. There's a very weird behavior in which an 'open' dialog will spaz out an make your computer UNUSABLE unless you manage to FORCE-QUIT dammit.
This has happened 100% of the time using it.
In addition, Dammit has hardly any of the features other competitors do in this category of productivity applications.
I think MoApp is a truly gifted developer, however, this app seems to be rushed. Maybe that's why there is hardly any support for it on their website.
Hopefully he releases an update on the MAS, since others are noticing these issues as well.