This plugin was not intended for offline cold storage. Obviously the 12 word seed is the best way to do that.

This plugin was intended for cases where the intention is giving away small gift amounts in bulk but still maintaining the ability to clawback unclaimed balances. Several people have wanted such a thing in the past and had to resort to keeping lists of private keys, and then manually monitoring them. This way you can easily keep an eye on what gifts are claimed or left unused.

Do not use this plugin with a wallet intended to be secure offline storage.

@Yakov,
If you don't get the Tools, Papergen menu item then it is probably related to not having an open wallet. I couldn't find a generic start-up hook for plugins to trigger attaching a new menu item, so I do this on the wallet-open hook.