I had the same problem with SLviewer and my other viewer was not teleporting me anywhere.
Followed all steps.
I suspect that my ancient grafics card (ATI HD 5970 on Win7 Ultimate 32bit) is announced as not supported and i could not update the drivers from windows with any other of the available updates on internet (declared as failed or not changing anything- rather reinstalling my windows provided drivers)
I did clean unistalls again and again, with full erasing of all files and exe mentioned, both programs, but still SLviewer faded without warning at Initialising VFS.
My solution though was with changing viewer program. After clean uninstall, full with CCleaner, and after multple restarts of the computer, the firestorm seems to be working even smoother.
Still sure not i am, on what was the prob
thanks all contributing for future and other troubleshooting with answering