PayPal in CE 4.1.5

Hi,
the PayPal Modul update announcement from March 30 claims it requires OXID eShop 4.2.0 or better. Well, I’m using 4.1.5 CE…
When I click on the “Download” link in the message in the message area of the cockpit I get a zip file named MOD_PAYPAL_1.5.3_21278_OXID_ESHOP_CE_4.1.4_21266.zip which I installed.

Anyway, the cockpit says the shop connector is ok and PayPal is installed. I do see the PP Express button in the cart. If I click on the button I’m redirected to the PayPal login. After logging in I see the typical PayPal payment page but no order relevant data. No price, no articles, nothing. I can confirm the “payment” and I’m redirected back to the checkout in the shop in step 3.

Check it out in live on shop[dot]chateau-d-arlus[dot]com

So is this an installation problem or is the module just not compatible with the shop version I’m using?

Any help is appreciated!!!

Cheers
Mat