Start the Launcher, then click 'Get More Content'.
Find the Content pack you wish to uninstall in the list of content
packs, and click the 'Uninstall' button.
Note - if this is a mod you have created yourself, it will remove
it permanently.
If you wish to reinstall that content pack, if it is a Short
Fuze pack that you have a licence for, when you restart Moviestorm,
the Launcher will reinstall it automatically.
If it is a mod, you would need to reinstall it from the original
.addon file, as in
http://support.moviestorm.co.uk/kb/content-packs/how-do-i-install-a...