Attempting to apply Adagio Payable 8.1E Upgrade to no avail. Receive the following error: "The file c:\softrak\unpack\ap\qrmaster.qrw could not be opened"

Unfortunately after downloading said upgrade via the link provided by Softrak and following all the instructions, we are still unable to continue due to the above error. It appears that despite the upgrade unpacking within the C:\softrak\unpack\AP\ directory and being able to see the QRMASTER.QRW file that the setup is unable to open this particular file.

We can confirm that the end-user has all the necessary rights and privileges both to her workstation as well as the server. What we find interesting is that the file in question is unpacked and resides on the end-users workstation to which she has full local admin privileges as well.

Any further insight in to this issue would be greatly appreciated.

Workstation: Dell Optiplex 9010, Windows 7 Pro 64-bit
Server: Dell PowerEdge T310, Windows Small Business Server 2011

Thank you