I downloaded/installed 4.44-dev-int1 build this afternoon and now GCM crashes about 5 seconds after opening. I've cleared the cache on the app and restarted a couple times with no luck.
Where do you find the development builds for Garmin Connect?
I guess you should contact Garmin directly according to the channels they supplied to the testers of those builds. That is how it works for the device beta software.
I suggest that you use the stable production release instead.