How do I add a version control to upload files / images using Plone 4.1?
First of all, to activate versioning for images, follow these steps:
1) go to site setup 2) Click types 3) Select an image from the dropdown 4) select Automatic versioning
Even so, I don't think there is no automatic versioning for ImageEditor changes. The ImageEditor simply sets the field value for the image and does not emit any event-modified objects that I believe are necessary in order to execute the plin-version.
FWIW, I am the author of Products.ImageEditor. You can submit a ticket for this issue if you like: https://github.com/collective/Products.ImageEditor/issues
source to share