What steps will reproduce the problem?
1. rip.exe -r NTUSER.DAT -p skype
2. Or using GUI
What do you see instead?
DownloadLastModified value not found: Can't call method "get_value" on an
undefined value at c:\program files (x86)\regripper/plugins\skype.pl line 50
What version of the product are you using? On what operating system?
2.8 with April's update. Windows 8.1, x64.
Please provide any additional information below.