Multi-currency is generally supported on QuickFile in so far as you can create sales and purchase invoices in currencies other than GBP, you can also pay these into GBP bank accounts or accounts denominated in any other currency, e.g. USD, EUR etc.
The PayPal feed however cannot fully handle multi-currency transactions as the PayPal feed does not supply the exchange rate and this is applied several days later. This is something I’ve explained in more detail in other threads. For that reason the PayPal fee will only import GBP entries, any other items will be ignored.