Now that placiibo+ isn't offered anymore, how do I access placiibo+?

If you need to restore your purchase of placiibo+ you can simply go to Settings > Unlimited and tap on Restore Purchases at the bottom. placiibo will recognize that you had purchases placiibo+ and will restore placiibo+'s features. The confirmation message will specifically mention placiibo+ and you can see that placiibo+ is enabled at the top of the settings screen.