Upgrading Extension from 3 Ver. to 4 Ver

Dears,

Greetings,

i'm looking for an assistant for an extension that developed for v 3 and previous versions,

linked below,

https://www.opencart.com/index.php?rout ... _license=0

what is the process to make it applicable for Version 4.0.2.3

Thank you in advance.

Best to post it in the Commercial Support, to find a professional developer who can do it.

Also, have you asked the extension author whether he can upgrade it for OpenCart 4?