Besides this forum, there are training videos/books and email. Most of the time if you post here your question will eventually be answered, sometimes it takes a while. If you want to contact Thermwood directly try:
http://www.ecabinetsystems.com/ecabinet ... mation.htm
The hoops file error seems like a freak occurrence. I've only encountered it once out of hundreds of design jobs. The biggest bug I've found is in the shelf editor, if you ever go back in that area to edit an already placed shelf, don't hit cancel if you change your mind, Ecabinets crashes almost every time I do this and I don't always remember to save the job before hand. I wish Ecabinets had autosave functionality, I may write an autohotkey script one of these days to do that. Anyhow, If you watch all the training videos and read the manual you should be fine for the most part.
As for backing up and being able to archive different versions of files, I think that in windows 7 and later you can set it up to automatically create restore points for files at a set interval, haven't had time to really try it out though. I like Dropbox b/c it's easy to use, but I think Google and Microsoft offer similar services.