Delete Scrivener 1?

I recently downloaded Scrivener 3. A project I was working on in Scrivener 1 opens in 3 with headings only. My text has disappeared. I’ve tried pausing Kaspersky, with no effect. Fortunately I have saved compiles of my work. Should I delete Scrivener 1?

Please whitelist Scrivener 3 in Kapersky and in any other security software you may be running. Then reinstall Scrivener 3.

All known instances of this problem have been traced to security software deciding Scrivener is bad, and refusing access to its files.