Unable to Download after purchase?

HTC Desire, just gone through the links on my phone and purchased the software. Now it shows 'purchased' at the top right and I have the install button at the bottom, however each time I try the install it fails to download with the 'unsuccessful'. I'm on wireless at the moment and have good signal so don't think it's a comms issue.

Is there anyway to download the program and install it manually via a PC?

thx
Chris

Thanks for the reply, tried that but still failing on download.