Activating the plugin clears previous settings

If you have configured the settings in WP Mail WPTP, then temporarily deactivate the plugin, it clears all the settings on reactivation.

To be specific, activating the plugin simply overwrites whatever may have already been stored in the wp_mail_smtp option in wp_options.

Refinement request: upon activation check to see if the wp_mail_smtp option is already set, and reuse those settings.

Why?
Various reasons perhaps (such as needing to deactivate plugins when troubleshooting). In my case, we use this plugin on the development site but not live site. Every time I export the live database to local and reactivate the plugin, I have to hunt up the mail info and reconfigure.