I had the same question and found a different answer;

There is a new option now (2017) where you can choose to install a clean droplet again, look for Rebuild Droplet in the Destroy menu.

Here’s a typical procedure:

1. Shutdown (by command line) or power off the system (from DO control panel)
2. Take a snapshot of your current droplet (just in case you forgot something to preserve)
3. Delete the droplet and wait a few minutes even after it says complete.
4. From the DO control panel select “Create Droplet” icon, and configure your droplet. Your IP is not guaranteed to remain the same, but there’s a good chance that it will.
5. Keep the snapshot you made until you feel comfortable with the new droplet.