Can I convert my Personal Historian 1 file to Personal Historian 2 or 3?

Yes, you can convert your Personal Historian 1 file into Personal Historian 2 or 3. 

When you first open Personal Historian 2 (or higher) on the Welcome screen you will see the option - "Convert a Personal Historian version 1 file". The wizard will walk you through the process.

You can also go to File>Import>Convert version 1