"You'll have to re-donate again if you want the star to show up. "
You also shouldn't feel pressured to donate the same amount each time. If you enjoy the perks you receive along with the idea of helping ACC out, a smaller amount (5$) will also suffice and provide you a renewal of your star along with a few perks. I used to donate 20 bucks each time my perks expired, now I donate 5 dollars each year as it is more in my budget since I am the one paying for it now (where as it used to be my parents).
Send me an FCR if you want to wifi on NL!