QUOTE(N04h @ Apr 22 2015, 15:21)

Did you read the instructions on the first post?
For it to work you need the login of the account that purchased it.
Yes I did, and it doesn't say anything about 'account that purchased it'
QUOTE(wocle @ Oct 7 2012, 02:56)

Instructions
1. Place viewerrip.exe in the folder where you want the ripped files to be saved.
2. Run dmmviewer.exe or dlsiteviewer.exe
3. Open the file you want to rip with dmmviewer/dlsiteviewer. Enter your login information if necessary.
4. Run viewerrip.exe and wait for it to finish. It will run in the background, so you can use other programs while you wait.
I didn't buy it, someone else did. Anyway, it doesn't matter now. They did it.