Seems to be a showstopper :)

I still want to get to the root of this.. could you tell why you need to see the tags one-by-one? Or is it just to get to some needed tag without using the mouse and without having to type the tag name?

Released in 2.0.3

1) Thanks, it is much better this way. I agree that SQL Server is a good fit, but there still may be many users who would prefer PostgreSQL or MySQL or Oracle or whatnot)
2) This actually indicates a need for a different product. Maybe such requests deserve a tab of their own - like "CintaNotes-based products", which would include this request and also things like "CintaNotes for Mac", for Android etc.
3) I agree, the network share approach is not very reliable. But with hourly backups and low traffic it could actually be workable for very small groups. Also it is workable right now with Simplenote sync.

I think I know the reason:
1) You were too specific mentioning SQL Server.
2) This idea just isn't popular in the current CN user base :(
    http://roadmap.cintanotes.com/topic/3366-support-for-multiple-users-working-with-same-shared-notes-database/
3) Some kind of collaborative work is already possible via placing a CN db onto a network share - and this is much easier than having to configure SQL Server.

This is a side-effect of the current implementation ;) But since the behavior in general is correct, no need to change this.

Also, do you have a registered version?
In free version, setting of only one notebook at a time can be remembered.

Released in 2.0.3

Can't reproduce b). Please provide more detailed description: which sort order, where CN is located, how do you open the db, how to you open the first db (do you use the MRU list?), do you use the File/Close command?