Updates behind Corp Proxy/firewall (Zscaler)

Hello folks,

I am having a certificate error when attempting to update WinSCP. Does anyone know the URL that WinSCP attempts to access when updating? Certificate errors are not uncommon when an application is being blocked by Zscaler. The specific error message is

Certificate not trusted.
Error: 800B0109, Chain index: 0, Element index: -1
Server certificate verification failed: issuer is not trusted

We are on Windows 10, WinSCP 5.17.10 (build 11087)

You can see the URL under UPDATES_URL at:
https://github.com/winscp/winscp/search?q=UPDATES_URL