We've just released version 1.1.6 of the PayPal gateway for SimpleCart. This release fixes an issue with transactions over €1000 being incorrectly charged at €1. Thank you Leif for reporting this issue and working with us in identifying where this went wrong.
version 1.1.6 doesn't appear in package manager.
It's definitely there! If you're not seeing it as an update, you can find it in the package browser by either searching for paypal, or navigating to Free Extras > All Free Extras, it's on page 2.
Hmm.. it doesn't show as an update for the installed 1.1.5.
Have you tried searching for it in the package browser?