You can use the Project Explorer to perform Tortoise SVN tasks on multiple VIs or folders using JKI's TSVN toolkit.
Click here to read the documentation on TSVN Tookit.
Multiple VIs or folders can be selected from the Project Explorer window by pressing shift or control key and clicking on multiple components (VIs or folders).
Click on Tools >> TortoiseSVN and select the desires task to be performed on the selected VIs or folders.
Once the desired task is selected, the Tortoise SVN dialog will be displayed to continue with the selected task. The associated VIs will be displayed in the Tortoise SVN dialog.
From here on, rest of the actions are same and within Tortoise SVN scope.