Subscription, billing and refunds

Start a subscription

1. Install ASTERON KMS from the Microsoft Store and open it. You start on Lite.
2. Sign in with your ASTERON account. If you don't have one, choose "Don't have an account? Sign up" on the sign-in screen.
3. Go to Settings › License › Plans, choose Standard or Pro and monthly or yearly, then select "Pay". The "Start Standard" and "Upgrade to Pro" buttons in the account panel (bottom of the sidebar) open the same screen.
4. A checkout page opens in your browser. Enter a payment method and finish; the app updates right away.

• Payments are handled by Paddle, our Merchant of Record. Your card statement may show Paddle.
• For prices and features, see Features by plan.

Switch plans (Standard ↔ Pro)

To switch while subscribed, go to Settings › License › Plans and select "Switch to this plan" on the plan you want. A plan change page opens in your browser: select "Change plan", then confirm once more. There's no separate payment screen; your saved payment method is used.

• Moving up (Standard → Pro): the prorated difference for the rest of the period is charged to your saved payment method right away, and Pro applies immediately. From your next billing date you're billed the Pro price.
• Moving down (Pro → Standard): nothing is charged now. Standard applies immediately, and the unused balance of this period is credited to your next bill.

Manage your subscription (payment method, receipts, cancel)

Select Settings › License › Manage subscription to open the Paddle subscription page. There you can:

• Change your payment method
• Download receipts
• Cancel the subscription

After cancelling, you are not charged again and keep paid features until the end of the period you paid for. Then you return to Lite.

Cancel your subscription

1. In the app, go to Settings › License › Manage subscription. The Paddle subscription page opens in your browser.
2. Select Cancel subscription at the bottom left of the page.
3. Follow the prompts to confirm.

• You keep paid features until the end of the period you've already paid for. You won't be charged on your next billing date, and you return to Lite when the period ends.
• If you can't open the app, use the link in Paddle's receipt email or go to paddle.net to reach the same page.
• Cancelling doesn't delete your index or any local data on your PC.
• If it's been less than 14 days since a payment, you can ask for a refund instead.

Refunds

• Ask within 14 days of a payment and we refund it in full, no reason needed. This applies to first payments and renewals, monthly and yearly.
• After 14 days we don't give prorated refunds for the rest of the period. Cancelling stops future charges.
• If the service was not provided as described, or we could not provide it, we refund under applicable law regardless of timing.

How to ask

1. Use the link in Paddle's receipt email or go to paddle.net, or
2. Contact [email protected] or open a support ticket (Billing & license) and we will request it for you.

We reply within 3 business days. Approved refunds go back to the original payment method and may take 5–10 business days depending on your bank.

After a refund, paid features for that payment end and your account returns to Lite. Your index and local data on the PC are not deleted.

Common questions

Is there a trial? No. Use Lite for free, and paid plans can be fully refunded within 14 days.

Can I use it on two PCs? Every plan is for one PC per account. Signing in on another PC signs the old one out. See Account and license.

Are there discounts? Yearly billing costs two months less than paying monthly. There are no other discounts at the moment.