The disk image http://www.qrecall.com/release/QRecall_2.0.0rc1.dmg contains the app 37rc for me.
This app shuts down right after launch both on Mac OS 10.6.8 and 10.7 for me.
What am I missing?
Thanks!

QRecall 2.0 requires OS X 10.8 or later. I'm sorry if that wasn't clear. I'm sure that was mentioned somewhere in the 400 pages of release notes...

OK, that explains it, thanks!
(I did look for OS version beside the download link, and I was glad not to see the crossed out app icon typically coming with OS X 10.7 or later apps on OS X 10.6 but I did not look for release notes as I was going to test my specific 1 TB issue on a copy anyway. With no 10.6 support, that option is gone anyway now).