I'm so sorry to hear this. You're actually not in a "beta" version of our product. You're using our Toolkit layout which is pretty much the same as the older version but some things are rearranged differently. There is no change to the actual products that you use, just in how it looks.
It sounds like you may be experiencing difficulty with your connection and I'd like to give you this FAQ to help you troubleshoot.
When you had the drafts "lock up", which browser did you use? Are you able to try another browser or that same browser in safemode/incognito mode?
Please try that and let us know should it happen again.