The plugin works in general but it does not work when using multiple currencies.
I have the base currency CHF and wanted to add USD in addition.
the prices for the product I entered as follows:
CHF 24.90 (sale price)
But - it does not work!
Have a look at the shop how it's being displayed:
Screenshot of my shop
Instead of 19.90 USD it shows 1 USD plus adds CHF in the end for no reason.