Yes, you can update multiple files simultaneously under the following conditions:
- your UpSlide version must be 4.3.1 or higher
- all the files you wish to update must be either PowerPoint presentations or Word documents, but not both
To update multiple files, you simply have to click the Update all button.
By default, this feature lists all imported shapes in the active presentation or document. You can select the Include all opened documents option to see all excel imports grouped by file (see picture below).
Once selected, you can then update all of your excel imports in a single click.