If the save button in the form or field configuration do not work, this often is not a problem specific for Visforms but the buttons will not work in any edit view in the administration of your website. As this problem is sometimes detected for the first time, while using Visforms, and we have already some post about it on our forum, we will give a short instruction on how to solve the problem herer.
The problem is cause be an sql update error that occures during Joomla! update. Go to extensions->manage->database and click the "fix" button. This will solve the problem.
Another reason, why the buttons in the Visforms administration do not work is, that some new files are not installed properly with the update. The folder administrator/componentes/com_visforms/layouts is missing then. Please download the Visforms installation from our download menu (make sure that it is the same version as the one which you have installed on your website. Extract the zip file and copy the folder admin/layouts from the extracted zip file to administrator/componentes/com_visforms on your webspace.