keys lost after deactivating / reactivating plugin

Nice plugin, thanks! One annoying thing I’ve found is that when I deactivate, then reactivate the plugin, I have to re-enter the keys. This is annoying when I’m developing / testing, and I often have to deactivate then reactivate all plugins for debugging purposes. Surely the keys should be deleted only on uninstall – if then?

https://wordpress.org/plugins/gravity-forms-no-captcha-recaptcha/