Please offer an option to edit the name, icon and the other brands of the wyUpdate.exe
You can replace all image branding in wyUpdate by editing the theme within wyBuild. You can also change the titlebar by going in wyBuild to File -> Properties -> wyUpdate and typing your new title.
As far as other branding goes you'll have to rebuild wyUpdate from the source code if you want to replace the "wyUpdate" string you see in the UAC dialog. The reason you need to rebuild from source code is because the UAC reads this string from an embedded resource in the executable (only if the executable is code signed).
Does that make sense?
Please add more options to the "Update Actions" -Page. It would be nice to run commands/programs before or after the update routine.
You can already execute files before and after updates. See Executing files in your update.
It would also be nice to be able to "kill" a process (not a service).
wyUpdate already checks that no programs are running in your app's directory when the update is happening.