Originally bought Docs To Go directly from DataViz and need to put it on a new phone

If you purchased directly through DataViz (which would mean your ORIGINAL purchase was in 2011 or earlier and was version 3.003 or older), you will need to re-purchase Docs To Go Premium through the Google Play store IF you want to use it on Android OS 9 or 10. The activation technology used back then is no longer supported.