How to remove exchange adjustment transactions?

[ginmur]

We have customer/vendor exchange adjustments - we ran them with standard method. After we realised they were not posted correctly, especially for scheduled payments, thus we reversed them with invoice method. Meantime we had to also run them with actual date and reverse them with the same date to be able to run it on already settled transactions - these were unsettled and after EA settled back. So there are now many exchange adjsutment transactions, affecting ageing report with huge amounts.
Then after some posting/ reverse posting we end up with EA transactions that were posted twice for the same invoice, but only one is possible to reverse - don't ask me how.
Then we were trying to manually correct those amounts - but then these corrections were shown as open transactions on customer/vendor, affecting detailed due date list and special report for customer. And also there are too many these problematic EA to fix, it will be easier to delete them all, if possible. Do you know how?