Disable update popups when opening Endnote

We are currently getting pop up nag’s in X8 to upgrade to X9 on launch.

When X8 was deployed the USERCANAPPLYUPDATES=F switch was used on the MSI installation.

I can also see the entry has been entered into the registry under Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\ISI ResearchSoft\EndNote\18

But, still getting the pop ups on launch, did something change with the installation of X8 in order to disable these prompts?