You should get this update if:
1. You updated to 1.1 and couldn't open the app.
2. You still have version 1.0 and never updated to 1.1.
If you have a working version 1.1 (that's the majority of users), you need not update (versions are not different).
Update (August 7th): Yes, there's another fix - version 1.1.2. We're hoping this is the last of this issue. Sorry for all the waiting some of you had to do.