Adobe AIR app installation issue due to certificate problem on mac 10.9.5

Im trying to upgrade and then reinstall an Adobe Air application but get the error message failing to install due to a certificate issue.

The developer says the fix is to uninstall the app and install again but this also fails.

Checked my machine clock - saved but that didnt work

The adobe AIR uninstaller simply says I have the latest version? Cant seem to delete and reinstall although other adobe air apps work so I dont think this is the issue

I have gone through the troubleshooting guide: Troubleshoot AIR installation | Mac OS but still have the issue?

Any ideas would be great.