Did you tried this : 2015 SOLIDWORKS Installation Help - Notes About Configuring SOLIDWORKS Toolbox
Upgrading an Existing Toolbox
Upgrading a Toolbox to a new SOLIDWORKS major release version makes that Toolbox incompatible with computers running prior major release SOLIDWORKS versions.
If other computers remain at that prior major release and continue to require a Toolbox configured for that release, you should make a copy of that Toolbox and upgrade that copy. The new SOLIDWORKS installation will upgrade the copy of the Toolbox and the previous SOLIDWORKS installations will continue using the old Toolbox.
Here is an older guide if that helps: http://www.javelin-tech.com/blog/2013/05/sw2012-manually-updating-toolbox/
Please keep a copy before you upgrade.
Thanks. I looked thru that guide - thanks for the tip.
I assume the most reliable method is to let SW upgrade the current toolbox on installation? (so it does it automatically instead of manually?)
I installed on a workstation and chose this method...looks like it updates the database...and some of the drawing files in the toolbox (not all of them).
I usually have different versions of toolbox for each major release. So not sure as why the installation didn't updated all of them.
Could you please ping your VAR and let them find the reason for it and best way to upgrade the toolbox in a situation like yours.