Ghosts. Woo-ooo-ooo. Boo!

[The-Architect]

I made a mission in the editor and about half way through I jumped into my challenger I tank in preview and had a look round at my handywork. All seemed well so I removed the Challenger as it was not needed, and completed building the mission.
Some days later during a clean-up of my addons folder I decided that I no longer wanted the Challenger so I deleted the addon file.
Now, to my dismay whenever I try to play the before mentioned mission, Flashpoint asks for the absent Challenger addon and won't let me play the mission. There is not a Challenger in the bleeding mission!
Please tell me what's happening. This is affecting most of my missions, with various addons.
Cheers.

[Homefry31464]

Look in the mission.sqm file and delete the line about the challenger.

[macguba]

Note the mission.sqm has 3 sections listing addons:  one at the top for the mission and two others lower down for the intro and outro if you have them.

[The-Architect]

That's done it cheers guys.