Manage Nebula Pro.
Payments, invoices and cancellation live with Lemon Squeezy, who process your subscription. Your license key lives in Nebula's Settings.
Activate Pro on a PC
Find your key
It's in the receipt email from Lemon Squeezy, and in your billing portal — sign in with the email you bought with; they send a one-time link, no password.
Paste it into Nebula
Open Settings → Subscription, paste the key and press Activate. The card changes to Nebula Pro and every feature unlocks.
Done — on up to 2 PCs
Use the same key on a second PC. Nebula checks it once a day, and keeps working offline for 7 days.
Move Pro to a new PC
On the old PC, press Deactivate this PC in Settings → Subscription. If that PC is gone or won't start, email support@nebulamapper.com with your order number and we'll free its slot. Then activate on the new one.
Update your card or cancel
Open your billing portal, choose your Nebula Pro subscription and update the payment method or cancel. After cancelling, Pro keeps working until the end of the paid period.
Something's wrong?
- "This key is already in use on its maximum number of PCs" — deactivate it on a PC you no longer use, as above.
- "Your subscription has ended" — if a payment failed, update your card in the billing portal and press Check again in Nebula. A new subscription comes with a new key: paste it into Settings → Subscription.
- "Couldn't reach the license server" — check your connection or firewall; Pro keeps working for 7 days meanwhile.
Still stuck? Email support@nebulamapper.com with the email you bought with.