The downside of beta-versions is that they aren't finished yet. So you may occasionally run into quirks and bugs. I'm sure that's what you were told when you downloaded the application.
You possibly even agreed to report problems back to the developer.
Another downside is, because betas are new, there aren't many people who have a lot of experience with it.
My advice would be:
Ditch the beta, go back to your previous version. and wait till you see a new number with no 'beta' following it.
If you're not going the above way, at least tell us what kind of errors you got.
Without proper information nobody can do a thing for you.
Success!
Ojo