I am using 1.3.9h and received a message that said I must update. Is this correct? But I found the statement below on the forum-- does this apply to the March 2014 API update at PayPal.

2. Do all zen cart checkouts through PayPal now have to use Express Checkout.


Info: PayPal migration to 2048-bit certificates does not affect Zen Cart sites
FYI - many merchants are getting email notices from PayPal that PayPal is migrating to 2048-bit SSL certificates between July-December 2013.

The architecture of Zen Cart is unaffected by this change.

C