Not directly. But you can make a patch, then switch and lose your changes, and then apply the patch to your branch.
Rich click on your working folder with the largest folder, select Tortoise SVN> Create Patch. Select the files to include (usually all changes) and save them somewhere.
Then switch.
Then richt-click on the working copy again (which now points to the branch) and select Tortoise SVN> Apply Patch. You will get a menu in which you can right-click and choose apply all. Save the changes and you should be fine.
Peter
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