When I upgraded to Windows 10 last year, I decided to do a full rebuild and reinstall my FSX Deluxe Edition CD Box version along with the Acceleration Expansion pack CD then afterwards I discovered Jordan King's You Tube Channel Clips Top 10 Reasons that FSX Steam Edition is better than the Old Boxed FSX editionshttps://www.youtube.com/watch?v=3UpQgUBKDKM
and also Jordan King's
FSX Steam Edition - *FSX Steam Edition 101 and Settings Guide!* https://www.youtube.com/watch?t=2056&v=xgt9BLYc5rY
The FSX Steam Edition is essentially the same as the Old Boxed FSX Gold editions with the major difference in that the FSX Steam Edition uses a more updated modern program compiler to compile the older 32bit Microsoft created FSX Program Code.
In using the Steam FSX version it makes FSX life easier rather than having to go in and make tweak adjustments to the CD boxed installation FSX.cfg file settings.
This sealed the deal for the Steam sale promotiomal purchase of Steam FSX-SE
During the installation process, I found that their were issues with having multiple main FSX directories that co-existed as I had initially installed unknowingly.
C:\ Program Files (x86)\Microsoft Games\FSX
C:\ Program Files (x86)\Steam\Steamapps\common\FSX
The PC Registry was screwed as when trying to run 3rd party Add on scenery, aircraft installers, the installers would be unable to determine where the correct main FSX directory path is located, to be able to run and install either the scenery or aircraft etc into the relevant folders within the main FSX directory.
To resolve I first uninstalled everything to do with the Microsoft Games FSX Program version and also the Steaam FSX Program version.
I then Rebooted and restarted the PC and check via Windows Explorer everything to ensure their were no references to the FSX directory paths.
This means checking the C:\ Program Files (x86)\Microsoft Games
Also check and potentially look to remove reference to
C:\This PC\Documents\Flight Simulator X Files
Then go through and do a registry clean up, I used the TweakFS FSX Registry Utility.http://www.tweakfs.com/store/free_tools.php
Download the file FSX Registry Utility for the fsx_reg_utility.zip
Here's a reference guide How to remove the old FSX before installing FSX-SEhttp://fsrijnmond.airworld.nl/FSX%20Ste ... FSX-SE.pdf
Install or run as the administrator of your PC to do a clean up of the specific FSX Registry setting keys.
Once this is done Reboot restart your PC.
I recommend doing this after a registry clean to ensure a fresh clean registry upon reboot start up.
If you are familiar with the Registry Editor Regedit and know how to exercise with caution care when using. I would open the regedit and go to the Edit drop down menu and select Find and type FSX in the Find What: field box and click the Find Next button.
This will look and search for any FSX entries within the Registry.
If you cannot find any FSX details then the Registry Cleaner has done it's job correctly.
If you do find anything related like HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft Games\Flight Simulator\10.0
Particularly after knowing that FSX has already being uninstalled and is confirmed not showing under C:\ Program Files (x86)\Microsoft Games
I would recommend then to exercise with caution manually delete HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft Games\Flight Simulator\10.0 from the registry editor.
Provided that it is your intention to not have the Microsoft Games CD Gold Boxed version of FSX installed at all.
Once you are satistified that the Registry is clean of anything to do with FSX.
Again I would recommend a restart reboot to be safe.
Then go ahead and do a fresh re-install of the Steam version of FSX.
I myself choose to re-install the Steam version of FSX on a separate 1TB SDD.
With the Drive Path looking like F: Steam\Steamapps\common\FSX
With my Registry search finding HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\DovetailGames\FSX
Yours should be similar please note you do not want the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft Games\Flight Simulator\10.0 as this relates to your previously installed FSX Gold Edition boxed CD installation.
Once I had this all tidy then I recomence the long task of re-installing all my old Add on's previously installed etc inculding Orbx and VLC from backup installation files.
I also have an old payware RealNZ Across the Strait CD that contains RealNZ Wellington, Marlborough and Paraparaumu purchased a long time ago from Robin's GodZone store.
I have only bothered installing RealNZ Marlborough from the CD as I have all his Godzone Photoscenery Subscription Scenery which has superseded the older CD Across the Strait versions of RealNZ Wellington and Paraparaumu. Likewise I've not also bothered with the older CD version's of RealNZ Tauranga and Rotorua as it's now covered in the newer updated Godzone Photoscenery Subscription Scenery.
I've found with the older CD installers that Robin has used. I need to manually type or use browse to the main FSX directory location path to change the installation path to point in my case to F: Steam\Steamapps\common\FSX
This method has also worked for me on his other older products that I have installed successfully RealNZNelson and RealNZSupercity
VLC uses an older installer which does not allow you to manually change or browse to the installation path, it seems to use the PC Registry key to determine the location of where you have the Main FSX directory installed.
Hence if you wish to use and install the now old VLC it is important to ensure that the Registry is clean and tidy from any previously installed or re-installed multiple times of FSX. If doing constantly an uninstall followed by a re-install of the FSX program. Then it pays to ensure that the Registry is made clean every time for a fresh re-installation. Be it on the same drive or on a different new drive path location.
This means that provided that you have no other FSX directory location registered in the Registry, assuming in your case you have created a Folder called Games on a separate drive and installed Steam with the correct location for FSX now being E:\Games\Steam\Steamapps\common\FSX
The older VLC installers should automatically detect the main FSX directory and output it's folder directory and file extracts to the correct location paths within the main FSX directory.
Here are some screen shot examples hopefully this helps a little in understanding.