This means that when you upgrade you get all the models upgraded that were changed in one go.  Any you have activation codes for will work straight away.

I had the D4 under Pianoteq 5 and that became the Steinway D under Pianoteq 6 with no other changes.  All the extra models I purchased became active immediately with no additional work required - just activate version 6 and you should be good to go.

All my FXPs were also available immediately (although they're strictly speaking designed for Pianoteq 5 rather than 6 - Pianoteq 6 specific FXPs have started to appear, but the updated models seem to be making everyone happier with the presets so I think we may see fewer FXPs).

Note also that your existing version will also continue to be available as a separate application ( you can run either Pianoteq 5 and 6 after the upgrade any time you want ).

The only thing I had to "reinstall" was the PTQ files for the free KiViR and Clarion Bells collections which are available on the website.

As an experienced IT user and programmer I have to say that if every software maker modeled their upgrade policy on Modartt it would be ideal.

The Steinway B is an add on. It will be upgraded if you have it already.