Anyway I accidentally sent out a no fee transaction from mSigna. I know, stupid move. I have absolutely no clue how to reverse it and all the info online is for bitcoin core. Running on Windows 10, can anyone point me in the right direction on how to withdraw or resend this transaction with a higher fee? Thank you
You should wait until the network forget about it and reject this transaction. It will be back on your wallet. It should take a maximum of one week for the network to reject such transaction.
There is also double spending but is difficult in other wallets, here should be even more difficult so I cannot help you in this. Better wait for your coins back in your wallet and next time use the adequate fee.