You convert old Sticky Notes StickyNotes.snt data file to the new Sticky Notes plum.sqlite data file so that you can use the Windows 7 legacy Sticky Notes on Windows 11/10.

Next, search for it in the Start and open it. In the DB browser software, click on Open Database Navigate to plum.sqlite file location, and select to open it.

You can open this file using any application that can open a SQLite database. This is an open format, meaning your data should be readable for decades to come.