No, you do not need to buy two licenses.

You can buy a single license key for your actual domain that is going to be used for your production site. You can use two licenses key for the development website on localhost. Moreover, the same license key will be valid for all the subdomains of your main licensed domain. So, you can host your development / staging site on one of the sub-domains of the licensed domain.

For example, if your production domain is http://www.example.com/, then you can host your staging site for any of its sub-domain, like http://dev.example.com/ or http://beta.example.com/ or any other sub-domain or on your localhost.

You can change the license key for the plugin from nopCommerce administration panel. To change, please follow the instructions:

1. Log into your nopCommerce store as administrator, go to administration panel and then go to Configuration > Settings > All Settings (Advanced)
2. Search for the following Setting Name and replace its value with a new License Key you have just received. Make sure to save the changes for each setting key.

Setting Name / Key Corresponding to the Plugin:

No way. If your download license expires, your nopAccelerate plus pro/search extension will still work just fine unless something changes with the nopCommerce core itself. You just won’t have access to download the plugins or add-ons, won’t receive product updates and won’t be able to access new add-ons or the incredible product support that we offer.

Renewing your download license provides an additional year of support and software updates. This provides peace of mind knowing you can turn to us for our extensions related support and assistance. You’ll also continue receiving software updates to ensure nopCommerce compatibility as well as great new features and enhancements!

You can quickly and easily renew your license at a discounted price within 60 days of your expiration date. The renewal license are available at 50% discounted rate of full price. After the 60 day window has expired, all renewals are at full price. Coupon codes or other promotional discounts do not apply to renewals. This discount is only applicable on download and enterprise edition license.