The BASIC Anywhere Machine: Programming Reference has the “Home” tiddler as the only default, and the “Startup Actions” tiddler does the magic of triggering the “Home” tiddler to present the alternative interface (i.e. hides the native TiddlyWiki interface.)
I’ve just setup the mechanism for giving URL’s to specific tiddlers in the programming reference such that the native TiddlyWiki interface remains hidden.
Dissect the following links, and the “Startup Actions” tiddler to see if you can figure out what’s going on: