Got importing the HTML format to work, on a stump of Builder.
Shifted code from IDE into being loaded through XUL to try and fix up the code loading it does. At this point, Builder boots again at least.
Managed to save Sel 1 script to HTML.
More stuff works now.
Everything pretty much works again.
Fixed error messages while loading and broken sel2 loading.
Merge branch 'loader_fix'