I recently upgraded to Splitwise Pro to try the currency conversion option. However, it went back and screwed up hundreds of my past transactions, and also affected everyone in all of my groups. This was extremely frustrating and had I known this would be the result, I would not have used this feature or even purchased splitwise pro to try it.

I think the app should just let you create one transaction per person to convert all currencies. This way I can have clear transactions converting currencies and can revert if needed.