FS9 Update question

[TXGrunt]

If I install FS9.1 update will I lose flight environment and will it make any changes to my payware aircraft (sounds, panel, etc.)??? I have the update but not sure if I should install it.

[Midnight_LS1]

It won't affect your payware aircraft and sounds.

It's mostly for the FS9 engine and the scenery to replace missing bridges, fix airports...etc.

However you should make a backup in worst case...

If you have the no-cd FS9.exe, it won't work in the FS9.1 after the update.  There is a no-cd FS9.1.exe out there but don't ask for it on the forum, the mods have a problem with it.