I managed to install Github on Windows and get the .jar file. Upon install, I get an error, even if I make the 'Devcoin' folder manually.
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Are you running as admin looks like it doesnt have priviledge? Try to install to say c:/mydvcwallet or something.
I run Windows as regular user. Apparently, the java installer indeed has trouble passing the standard security measures.
Installed in Desktop folder instead and moved everything to the regular program files folder. It workes fine and found my exiting wallet.
For the record: windows 8.1 pro 64 bit, client v0.8.5.1-g25a7d46-beta.
If someone wants to test payments again: 18GCTJhxrWfXjnLwwjJKsSYBpyEV16pRs (please mention return address in this thread).
Please note that payments will eat 0.5 DVC so I wont be able to return 100% of the amount received.