UltraVNC

I can't find where the VNC Viewer options are stored.
VNC Viewer seems to retain the options from the last time it was opened, but I can't figure out where. Is it a .ini file somewhere? Registry? In the .exe itself? Somewhere else?
Thanks.

Hello,

We are using UltraVNC (nice program btw) on a throughput-limited network. Because of this, we have particular encoding and colour settings we MUST use to prevent network instability.

What is the best way to save or enforce colour/encoding settings and saving this as the default behaviour ...