Hey Elmer,
I want to know if it's possible to change a download site after the fact.
Yes, change the site in wyBuild, rebuild wyUpdate and then include the newly built client.wyc in your next update.
Ideally we would like to store this FTP address in the database as this might change again later on.
If it's going to keep changing, you might be better off using a domain name you own. Or, if you can't do that, then you might find some use in either the -server="<url>" commandline switch or the %updatepath% variable and -updatepath commandline switch.
Thanks for the great product!
It's our pleasure. 🙂