Is there a way to reset quests - primarily the Tribunal quests? I've only visited Mournhold twice to sell some goods since the merchants have a fair amount of cash. While I was there I decided to set that lonely woman up with the merchant who's wife had died. The first time I played through Tribunal it all worked out fine and they were happy with their date. This time it failed miserably and the woman won't speak to me again. I don't know what I did wrong or what I failed to do.

I was thinking if I deactivated the Tribunal data file, loaded, saved then reactivated it and reloaded it might work but I haven't tried it yet.

there are few ways to reset stuff.

1. reload to your previous save game. duh..

2. tweak your save game file in TES : Editor. don't ask me. I forgot how.

or you could try your method. backup your save game file first.

Try the following (Save a backup game first).
In the console enter:
Journal MS_MatchMaker 0
set MatchMakeSunel to 0