Starting Stellarium 0.13 on a (NL-dutch) Windows 8.1 64-bits computer (fully updated as of Sept. 18, 2014) gives immediately after the splash screen an error dialog complaining that there is no disk in a station F.
I can click on a button Continue (NL: 'Doorgaan'), but then 8 more times the same error dialog appears.
After the 9th dismissal of this error dialog, Stellarium can be used as expected.
This stupid behavior renders Stellarium useless.
No problem with Stellarium 0.12.
No problem whatsoever with more than 120 application programs on my Windows 8.1 computer.
IMHO it is a Stellarium 0.13 compatibility problem, whatever the dear developers wish to think.
Alas: I have no clue whatsoever about the cause of the problem.
Please attach log.txt & config.ini files