DF Diaphragm & PROFIS AutoUpdate Errors

I am trying to install Hilti PROFIS DF Diaphragm which needs the AutoUpdate software as well. Once DF Diaphragm is installed it can open once, but when the app is restarted, the app crashes on startup and I cannot get a prompt for the activation key.

When I open "AutoUpdate", it tells me "Could not connect to Server". I've tried completely reinstalling both DF Diaphragm and the AutoUpdate software, even after deleting the contents of AppData\Roaming\Hilti, but this error still continued.

The screenshots of both errors are attached to this message.

Any help would be greatly appreciated, thanks!