When I try to select the drive I wish to copy my backup to FSX Backup crashes, When I relaunch it displays the correct drive to copy to but the "Backup" button does not appear to be enabled. It does nothing when you select it.
The problem with the Backup is fixed in the next version of the software. You will need to obtain the latest version (1.1) to fix the issue with the application. You can obtain it through the FSPilotShop website. If you have an account, log-in with it and then you should be able to download the update.