I would use a different rar extractor. Try UnRarX.
All the tools are stored with-in "My Documents\CELSYS\CLIPStudioPaintVer1_0_0\Tool"If you shared that, we'd have an exact copy of your tools, but we'd lose all our tool changes.Exporting them is individually seems to be the only way (maybe you could assign a shortcut key to do it quicker?