How to open older Valentina Database

[william humphrey]

I have a valentina database that was made for the "Mailbase" app.  I used
to open it with older versions of vStudio but the present version says it
is not "Valentina2" when I try to open it.

Since vStudio can open so many kinds of databases (SQLite etc) how do you
get vStudio to open older Valentina databases?

Or can anyone convert it for me?
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