How do you import new configurations into a toolbox part using excel?

I'm trying to add additional configurations to an o-ring part in the toolbox manager.  When I export the list, add new rows(configurations) and import back into toolbox the additional configs do not show up.  Anyone know if you can do this?  Or do you have to add new sizes one by one in the toolbox manager?

Thanks,

Eric Schwieterman

CSWP

SolidworksToolbox