Forge crashing on startup

Hi, I'm posting for the first time here, I've been playing forge for about a month so far and I've had no complaints, but just the other day it started crashing on startup. I would post an error report but apparently it's "too spammy" (not being able to post an error report seems like a big issue)
anyways, it seems to mention the card "Dance, Pathetic Marionette" which I believe is an archenemy scheme card. I know i had included this card in a custom deck, but I have no idea where Forge moves custom decks to.
I should mention that I have deleted the Forge beta and redownloaded it a few times but that didn't seem to help, as it seems the custom decks get moved to a different folder after they are originally placed in res/decks and I couldn't find anything relevant in the readme file. I would appreciate any suggestions on what to do as I am stumped at the moment.
anyways, it seems to mention the card "Dance, Pathetic Marionette" which I believe is an archenemy scheme card. I know i had included this card in a custom deck, but I have no idea where Forge moves custom decks to.
I should mention that I have deleted the Forge beta and redownloaded it a few times but that didn't seem to help, as it seems the custom decks get moved to a different folder after they are originally placed in res/decks and I couldn't find anything relevant in the readme file. I would appreciate any suggestions on what to do as I am stumped at the moment.