FSX Tutorials - Conflicting DLC in FSX: Steam Edition

Novawing24 presents a study into one of the drawbacks of the DLC system used by Dovetail Games in FSX:Steam Edition.
While on the surface a very clean and efficient way of delivering content for your simulation experience, it can have some serious pitfalls when DLC starts interacting with each other.
So find within some tips on working with these challenges.
DISCLAIMER! I state many times during this video and will put it here as well, what I show you can break your sim if you are not careful. Always remember to make backups of files and folders before you start messing around.
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This video contains the following content used under CC3.0:
"EDM Detection Mode" Kevin MacLeod (incompetech.com)

[@belgeode]

I needed this! Thank you very much .I had wondered where my extra F-18 liveries disappeared to! No worries, I know how to fix it now.

[@johnoflaherty2598]

This is an extremely ominous situation you bring up and i'm glad you did. Because I wouldn't have known this. Too bad Dovetail hasn't even brought up the fact that any of their DLC

[@johnoflaherty2598]

....Can do this....

[@johnoflaherty2598]

Hah! You said you're from the "Colonies" and that [calling it an 'airplane']'s not right. Then I'm curious what you would call it? An "aeroplane"? As an American, I've heard that term, but I always thought it was age-specific; (like from 100 years ago), and not region specific (like from any one specific part of the world). Interesting.