FLStudio doesn't decompress the wave files when you first install the program?
After some research the IL website explains that: "Many .WAV files included with FLStudio are .OGG encoded .WAV files. These files require the Vorbis ACM CODEC ...
I have downloaded off-line help program and set General settings > Advanced > Use offline help, but I still can't get real off-line help - only link to off-line HTML file. When I try to use the ...