I have purchased the Backupper Pro version for 2 Computers.
The Laptop has crashed, rebuilt it from scratch, reinstalled backupper but now it will not accept existing license code.
Have emailed support 3 times, but no reply as yet.
You can try with the offline-registration:
1) Cut your internet-connection while you are "registering": you get the machine-code for your PC; copy it.
2) Run again your internet-connection and click the link in the screen like in the picture
3) Put in your machine-code and Key as requested
4) You get an offline-Key: put it in your registration-mask.
Thanks, problem resolved.