I've been made aware of a bug when the delimiter is changed from ',' to anything else. The symptoms are that the file will export with ',' anyway and then import will never complete.
I'm working on a fix and will release as soon as I can.
In the mean time, I believe the plugin will work if the delimiter is left as ','. European users would need to adjust the settings in Excel to match (I can't provide assistance with that so please consult google).