Fixed, at the moment it's the only solution for me.
On the path android_secondary_root_path="/storage/40FB-A3B3/addons" (therefore in the Addons Folder) create two Folders: Content_TT and Content_Here. When TomTom is needed, rename Content_TT to Content ; When you need HERE, rename Content to Content_TT and Content_Here to Content. All this of course before starting iGo. It's longer said than done.