The version number isn’t exposed through the user interface at all right now (another feature for the list :-P). You can see the version through Settings->Application Manager->Mooshimeter. The version number is given at the very top.
As you know, the Android app is being updated quickly, so check back again soon. Since the app worked the first time and then stopped, I’m inclined to say it’s a process lifecycle issue that just needs to be hammered out. thing you might try is from Settings->Application Manager->Mooshimeter , force stop the app and clear all its cached data.