Sorry to revert to my previous post, Just found out that i (expirimental) fixed this widget, 2 months ago..... but i forgot about it. I would have shared with you if the app store was more community driven. like requested in: https://forum.mendix.com/questions/5984/Post-All-your-Widgets-on-GitHub
The company 'Flock of Birds' developed a version fox Mx5, If Mendix permits I post it on GitHub too. https://www.dropbox.com/s/dht3kjr5ol9jjy0/FormLoader.mpk
Newer version of mx 5 uses other version of dojo: https://www.dropbox.com/s/5nquoyleueos4s1/FormLoader.mpk
Some changes within the Dojo version used by mx 5.15 did break the formloader.
So I ported the formloader to work with Mendix 5 in the proper way https://github.com/Andries-Smit/Formloader
Mendix 5 does have snippets. Where ever you can; please use the snippets. In some cases where you do need to edit data in a template grid, you can use the formloader. But before you do; please check if the editable list view is an option too. As a last resort you can fallback on the template grid with this form loader widget.
Please let me know if the formloader is working properly.