Hi Karl,
Most payware just comes with a package that you drop into the community folder. Instead, you drop the package into your (for example) "3rd Party Aircraft Payware" folder which is inside the Addons Linker master folder, start addons linker and select it.
An update example would be when I got updates for the bbs-aircraft-l19 package, I opened Addons Linker, deselected the current version, I then added a "-old" to the old pacakge I just deselected, I then installed the new package to the "3rd Party Aircraft Payware" folder and then selected it. I can then quickly deselect the new update and re-select the old update to compare or whatever.
Rod