Designer Pro X10 - installation problem

[Rik]

Thought I would give Designer Pro X10 a 30 day trial.
Well, maybe not.

Part way through the installation, I get an error.
"Overlapped I/O operation is in progress."

I've restarted windows, and made sure no other programmes are running, but keep getting the same error.

I'm running Windows 8.1 32bit in Parallels.

I've not had any problems with Designer Pro X9, Designer Pro X, and any other Xara products.

The aborted installation even gives me the chance to report the problem, by clicking on the button that says 'Send customer service inquiry...'
But, that doesn't work either.
I get a message saying "Connection failed. "The server responded with the errorcode: 404"