wcfm marketplace plugin and free shipping calculation in Multi Currency

Hi,
I just purchased your Multi Currency plugin and it is really nice but I have one problem with correct calculation of the starting amount for free shipping.

I’m currency setting up WCFM marketplace plugin on my new site.
In WCFM vendors can configure their flat rate shipping cost as well as a starting amount for free shipping.

My store base currency is EUR.
If setting the free shipping starting from EUR 500 and I add the one test Product I have in the Shop costing EUR 100 as expected it does not qualify for free shipping thus there is a shipping cost of EUR 30 added.

However, if I switch the Product currency for instance to DKK where the price is then DKK 744,80 it falsely shows as Free Shipping.

I suspect you will say this problem is at WCFM’s side since the other currency converters I tested seem to have the same issue.

Unfortunately WCFM support is extremely unresponsive lately (they don’t answer anything), so I hope you have some suggestion how to fix this (I think you would make many WCFM users happy)?