I can't find anywhere to specify a VST plugins folder. I use Amplitude 2 by I multimedia to create my guitar sound, but I can't find anywhere to specify the directory (Steinberg) where the dll file is stored.
I'm afraid using VST plug-ins is not possible in that version. Those special editions are usually cut-down and modified versions of the bigger Music Maker. VST and MIDI support is usually limited to the bigger versions of Music Maker (e.g. "Deluxe/Producer/Premium" edition of the regular MM product line).