Some banks use a single account but maintain it in multiple currencies (e.g. Raiffeisenbank). The Flexi system is prepared for this option – you need to have this account entered twice in the list of bank accounts (menu Money - Bank).
The difference will be when filling in the Bank Information tab – the Bank Currency field, and in some cases it is necessary on the Electronic Banking tab to use a different Format for downloaded statements and payment orders.
At the same time, each of these accounts needs to have its own separate folder on your computer.