@ flag4
It means that your basic.cfg file, that's located in ...SilentHunterIII > data > cfg...is NOT the version that shipped with Stock SH3 v1.4b. It has been modified or corrupted.
@ dize
Have you checked the GWX files with the MD5 Mate? Follow Tarjak's link.
Actually, from the installers report, it can't find any files to check. Did you re-install SH3 1.4b?