I reported this as a Contour Bug over two weeks ago and have heard nothing since. If I export the form I can re-import it, but it will not save, even with no changes. My other forms will save.
If I import the form to a new Umbraco it will save, and I can make changes, if I reimport it, it still will not save.
I got the latest version of Contour and it did not make any difference.
Would it be possible to provide me with the export file? you can mail it to tg at umbraco dot com
Just sent it to you.