While for some games vorpX can modify configuration files, for BF1 that is currently not the case, so it’s 100% impossible that it could have done any lasting changes to the game.
That said, you may have made some changes yourself that now don’t work well without vorpX. Try renaming your Documents\Battlefield 1\settings folder. It contains all settings for the game.
BTW: For cases where vorpX actually is able to make changes to ini-files, you can revert those on the config app’s Game Optimizer page. That is – again – not the case for BF1 currently though.