1.2 ---- Released 2014 January, the 4th
+ Fixed a bug when rebuilding relocations
+ Rearranged dumping without rebuiding sections
+ Improved detection of targ ...
I'm afraid there is no encrypted data in your file. The squares and other strange symbols could be only numerical quantities, not having a direct correspondence in ASCII code.
Well, the "unregistered" string maybe would be reached when launching the proggy, and not whilst registering. Try to launch the application having set previously a breakpoint in that string.