v3.2 Uploading an image as a file

[Fredie]

Prior to upgrading to v3.2, images could be uploaded as a file for downloading, but with v 3.2 I can't seem to have an image as a file for downloading. From the frontend, 'Create Download' dialogue box the only allowed file extensions are zip, rar, pdf and txt. If I upload the image via the images tab, it's identified as a zip file without an available file for downloading. How do I change the allowable extensions for files so that images can be uploaded via the frontend?

[ColinM]

The  file types are specified in the uploads section of the configuration
Please see http://www.jdownloads.net/documentations/item/which-file-types-can-be-uploaded-from-front-end in documentation

[Arno]

The  file types are specified in the uploads section of the configuration

Sorry Colin, but not really.
Fredie must change it in the jD User Groups Settings.