What issues are you having? Have you not been able to get a hold of Rob to get these issues sorted out? I haven't run into anything that makes me want to revert back to 1.8.

IIRC, the new licenses do not work with the old versions, you'll need to contact Rob to have your license swapped manually (Or you can try doing the transfer yourself, I don't know if this works going back to the old version or not, Rob will probably be along shortly to confirm / resolve )

http://solidice.com/keyclone/transfer_request.html