It's not possible I'm sorry to say. Your boosters are stored in your phone so its not like your gold and level progress. But how can that be? Many of them were purchased, and I worked hard to earn them all and keep them!! I have probably 200 combined and am on level 1500+. There has got to be a way.
I'm not finding an envelope to click on. I assume you mean while in Candy Crush? Meanwhile I just got a lot of boosters added to my old device. Thanks for helping and let me know how I can get going on my new device. Thank you!