Thank you for that post! I had the same problem (a blank website), couldn't get a response from the developers and really wanted to get my site back without moving to my backup.
Interesting to note, I tested this on my local system backup, and it worked great. When I did the same install to the hosted live site, I got a blank white page during installation (some type of error) and then my website went blank. I don't know what was different about the hosted site vs my local site that made the difference. The only way I got my website back was due to the last post regarding disabling the Mobile - TeraWURFL under plugins.
Any ideas out there? Although I'm frustrated with the lack of support from the developers, I'd really like this to work.