Yes, you can!
You simply have to use the Update all feature.
This feature lists all of the imported excel data/shapes, in the active presentation and allows you to update them all or to select a subset (see picture below).
To help you decide which shapes should be updated, clicking on any of the items in the list will display and select the corresponding shape.
When you click update, UpSlide tries to update each of the selected items using the contents of all opened workbooks. The shapes for which the update has failed (due to excess or lack of potential source) are then put in a separate list as shown in the image below.
You can then open the find the source dialog box directly by double clicking the problematic items