Square WebPay support thread.

[simon1066]

All I can think of is, and I'm not sure if you've already tried this, install Webpay on a site where the old Square plugin is installed and working.

If it does install successfully then just remove the old plugin from within admin and don't delete anything related to the old Square plugin (files or dbase).

I used these instructions: https://docs.zen-cart.com/user/payment/square/