1. Right click the latest participants uploaded file and select, 'Download Linked File As...' (I just save it to my desktop)
2. I then open my BGU VJR Template that I saved (3 audio tracks, the 1st of which is empty, and the other two are 'distorted' & 'clean' guitar tracks with preloaded plugins)
3. I then drag the file from the desktop into the empty audio track.
4. I then lay down my 12 or 24 bars, and bounce the result back to my desktop. From there, I drag the file into a VJR folder I have in dropbox, right click on it in dropbox and select 'copy link'. Paste the link into the VJR thread for the piece and change the 'www' to 'dl'. And that should be it.
I usually put a Toontrack EZmix2 preset on the 'Stereo Out' to make sure I don't loose any volume. The one I use is 'Airy Ambience With Limiter' (see screenshot.
NOTE. Make sure when you are bouncing the track that you have set the selectors for the main track, and not your guitar part. The way I do that is I make sure I have selected the track with the backing track on it, (always my top track) and hit Command 'U'. That way the whole track is bounced.
If I can be of further help, don't hesitate to ask.