1) PayPal Europe is a separate module to US/Canada- does it work OK with Agile?
Yes, our modules should work for all countries as long as Paypal has service in that country.
2) if I use PayPal express checkout - I lose the voucher box on the Prestashop checkout.
So I have to use normal. If I use your module does it the same effect with the express option.
If you use normal checkout, the it will work like a normal Paypal module just like other modules.
It will not have Express Checkout feature unless you use Express Checkout mode.
3) Are there any fees other than the module purchase?
No, there is no other fees.
But it does not include installation service, you have to install the module by yourself.