Dash core should have done nothing to your doge wallet unless it for some reason was writing data to the dogecoin data directory. If it was, then it us possible that the wallet became messed up.
Can you give us the exact error that appears when you try starting up Doge core? Perhaps a screenshot?
There is a long pause when it gets to "Loading Block Index" and when it gets to "Loading Wallet" the error: "Warning: error reading wallet.dat! All keys read correctly, but transaction data or address book entries might be missing or incorrect." After click through this error it takes another 10-15 minutes for the wallet screen to appear but remains minimized and cannot be brought up. This error disappeared after I clear the chain index off of my computer when it first happened, but seemingly happened again after the chain was resynced and the computer restarted..
Should I clear the entirety of the appdata for dogecoin and try resyncing and restoring my backup to see if its one of the other files that I didn't delete when I clear the chain the last time..?