by toprob » Mon Sep 19, 2016 6:45 pm
As I wasn't sure exactly what you'd backed up, I just wanted to make sure that it was only addons you were talking about, rather than anything which FSX needs to work properly. Since it obviously was, then there shouldn't be a problem. Ian was essentially right, even though his solution was just do it and if it doesn't cock anything up, you're ok....
Of course you should always install stuff from scratch if possible, so that you don't miss anything which is installed somewhere other than the addon's folder. For example, a lot of addon scenery puts an elevation 'stub' in Scenery\World\Scenery, so just copying the scenery and texture folders would result in elevation issues. Most of the problems reported to me are elevation problems, and I suspect that these are mainly caused by trying to 'reinstall' via copying a backup.