I'm currently using Zen Cart 1.5.4. I know that I need to upgrade to 1.5.5.x, but my site is heavily modified and won't be able to do this until later this year. PayPal sent an email advising "PayFlow production endpoints are scheduled to be upgraded to TLS 1.2". My site supports TLS 1.2, which can be seen here https://www.ssllabs.com/ssltest/anal...chidcrafts.com

Will Zen Cart 1.5.4 work with this PayPal upgrade to TLS 1.2 ?