Last week, the developer of TinyUmbrella updated the most famous tool of jailbreaking community with the support for the iPhone 4S iOS 5.0.1r2 to save the SHSH blobs and AP Tickets for the Untethered Jailbreak, but it appears that some Windows users have been experiencing a lot of issues with the latest version of TinyUmbrella to launch.
From the Tiny Firmware Blog
Windows Bug Squashed
Thanks to an especially determined user (@szr8) I finally squashed a nasty bug that caused Windows users’ TU to crash on startup. Apparently it was something stupid that I was doing that I thought i wasn’t doing. Either way. Many of you have voiced this issue but now it’s fixed. This fix affects you if TU would crash on startup with “LibraryFinder” errors in the log.
The recent version of the TinyUmbrella comes up with a little bug which causes the software crash on the startup. However, the developer has updated the tool with bug fixed and now seems to be working fine for the users on the Windows OS. If you are one of those who have been experiencing the same issue, simply download the latest version of TinyUmbrella and fetch your iOS blobs again for the iPhone 4S iOS 5.0.1r2.