Hi whosyourvladi ,
Thank you very much for your post.
I am sorry to hear you have issues, but our add-ons have no compatibility wit any multi currency plugins. We do not want to work on any as we plan to develop our own solution mid 2020.
Regarding an older version of MI? I would approach it differently and look for a version of you multi currency plugin that worked with MI.
Hope this helps.
Pavel