I can’t test this, but the common syntax to access any UI element is
activate application "InstallerVISE"
tell application "System Events"
click button "Accept" of window "License" of process "InstallerVISE"
delay 1
end tell
I think there is something weird about how the installerVise programs(installers) are built.
Like I said I can see the button click when I try it my way but the window do not advance to the next step.
It could have something to do with it not being the fore most window?
How would I bring it to front and then click?