Did you try to update after running 5. 2? Maybe there is some registry value needed. Also under Vista/Win7 make sure you run as administrator on the program.
In fact I do use Windows 7 but I already knew I had to run it as admin.
What I did was: download 4. 91 and install (worked), run as admin - works fine!
Download 5. 30 patch, extract with 7zip, overwrite . exe and . mdb - run as admin: run into the "stevefire. mdb not found" error.
This was in both scenarios of installing it into . . \program files\aurora as well as any other kind of folder.
So, then I thought to myself "give 5. 20 a chance"!
Uninstalled everything, installed 4. 91, downloaded 5. 20, extracted it, overwrote . exe and . mbd - run as admin et voilá: 5. 20 runs flawlessly.
So, that leaves me with the error I described earlier: 5. 30 won't run, it still says it can't find the stevefire. mdb file. Dismissing that error dumps me into an error cycle so I have to kill the process.
5. 20 on the other hand works very well.