BackitUP 12 fails with Win 8.1 64 bit

I am trying to run BackitUP 12 with Windows 8.1 64 bit for the first time. The program starts OK, and I can select either file backup or drive backup, but when I come to the screen where I select the target the program crashes as soon as I click on NETWORK. I am getting the error message "Nero BackitUP has stopped working...." I have tried all the different compatibility modes, but it did not help. Any ideas?
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