I just updated Silverstripe from 3.0.5 to 3.2.1. Everything works allright, but the userforms plugin. It has two (or maybe 3) errors:
* The frontend shows the error "Uncaught TypeError: Cannot read property 'settings' of undefined" on jquery.validate.min.js in my element inspector
* The File upload field is missing in the backend. I can not select this option when i'm adding a field.
* I tried the most recent master built, and also the stable releases 3.1.0 and 3.0
I'm guessing this issue for you quanto has either been resolved or you have moved on?
Nevertheless, for anyone landing on this question with the same issue, you will need to install the 'secureassets' module for the UploadField to become available within the CMS Form Builder. This is security precaution for all versions of Userforms from version 3.0.0 Final.