crispydinner is absolutely right. This thing must have been writen by programmers who lack of insight of how comun music apps are arranged. I am not going into the hustle, but I want to piont out the possitives. Under Win xp the linuxsampler23.dll (the vsti) works fine to run .gig, .sf2 and .sfz files. When you load the vst, there are to windows coming up. If you don't like the GUI colors, they can be changed from preferences. On my machines it did not work with teleport. I think if one stays away fom digging into it's promises, it can be absolutely useful. Because the basic functions seem to be quiet stable.
I wonder if it is now possible to convert gig files to sfz with Linuxsampler? So far I had trouble figuring out how to operate Linuxsampler on macOS just to play that one gig file collection from Flamestudios, or convert them to sfz.