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
during update. It’s necessary the ADMX match to the BIS-F Version.