I have a Custom List that I had developed a Nintex Form for. I inadvertently created and pulblished an InfoPath form for the same Custom list. Now when I edit the list in Sharepoint, the InfoPath form pops up. How do I Break that connection, and re-install the connection for the NinTex form. (The NinTex form can still be opened in the editor mode, and publishing it does not stop the InfoPath form from being the live one)
you could try the following (it is a bit older, but should still be relevant for SP 2013): Reset Customized List Forms from InfoPath back to Default | SharePoint Adam .
Dont forget to delete the InfoPath form too!