Sometimes I modify a file at my pc, for example the background of a layout, and when I upload it to the server, It sais that this file already exist. Having to delete the uploaded existing file in order to be able to upload the new one. Could you add an option to update the existing file? So, I would not have to delete the existing file on the server to upload it again within the layout.
There is an option to replace media from the Library. Click the row-menu for the media item you wish to replace and click Edit.
Choose whether you want to update this media in all layouts and then click Replace.
You can then select the new version of the file, choose to delete the old version and then Start Replace.