Update from BIS-F 5.x
IF you update BIS-F from earlier Version, prior V.6.x you must manually remove the older Version (e.g. C:\Scripts),
keep a backup of your custom scripts and copy them back to the new custom folder of the new BIS-F Version.
Update from BIS-F 6.x
If you have V.6.x or later installed, you can simplify run the installer, it keeps automatically your custom scripts and shared configuration items
during update. It’s necessary the ADMX match to the BIS-F Version. BIS-F 7 1912 has many new GPO enhancements, see also the described migration path