---
title: "Installation & License Keys"
source: "https://docs.nexcess.com/category/purchase-installation/installation-license-keys/"
description: "Includes The Events Calendar “Upgrade to Pro” Message Appears Despite Having a Valid License, Using One License for Both a Live and Local Development Site, What’s Included in Each License, Finding and Inputting Your License Key and Moving a License Key From One Site to Another. 11 articles."
taxonomy: "category"
parent: "Purchase & Installation"
articles: "11"
---

# Installation & License Keys

Includes The Events Calendar “Upgrade to Pro” Message Appears Despite Having a Valid License, Using One License for Both a Live and Local Development Site, What’s Included in Each License, Finding and Inputting Your License Key and Moving a License Key From One Site to Another. 11 articles.

## Articles

- [The Events Calendar “Upgrade to Pro” Message Appears Despite Having a Valid License](https://docs.nexcess.com/software/the-events-calendar/upgrade-to-pro-message-appears-despite-having-a-valid-license.md): You may see an “Upgrade to Pro” message in your WP dashboard, even though you already have Events Calendar Pro installed and activated. This typically indicates…
- [Using One License for Both a Live and Local Development Site](https://docs.nexcess.com/software/the-events-calendar/using-one-license-for-live-and-dev-sites.md): 👋 Please note, Promoter will not work if your site is using one of the below whitelisted domains / patterns. To get started with Promoter please refer to this a…
- [What’s Included in Each License](https://docs.nexcess.com/software/the-events-calendar/what-does-each-license-type-include.md): All of our products are sold as yearly subscriptions. As long as your subscription remains active, you will have access to plugin downloads, new feature release…
- [Finding and Inputting Your License Key](https://docs.nexcess.com/software/the-events-calendar/finding-and-inputting-your-license-key.md): When purchasing a subscription for one or more of our plugins, your license should be included with your plugin downloads and activated automatically upon insta…
- [Moving a License Key From One Site to Another](https://docs.nexcess.com/software/the-events-calendar/moving-your-license-key.md): Let's say you change the domain name of your site. Or maybe your site no longer needs a calendar but you have another one that does. In either case, you want to…
- [Multisite Licenses](https://docs.nexcess.com/software/the-events-calendar/licenses-for-multisites.md): If you're interested in using one of our premium plugins on a multisite network, we've got you covered! We have special Multisite Licenses that can be activated…
- [Common WordPress Plugin Installation Errors and How to Fix Them](https://docs.nexcess.com/software/the-events-calendar/common-wordpress-plugin-installation-errors-and-how-to-fix-them.md): Installing plugins in WordPress is usually a straightforward process, but sometimes you might encounter errors. Understanding the most common issues can help yo…
- [Installing a WordPress Plugin](https://docs.nexcess.com/software/the-events-calendar/downloading-and-installing-the-plugin.md): Welcome to the wonderful world of The Events Calendar! You’re probably reading this because you’ve either downloaded one of our plugins or purchased the paid ad…
- [Accessing and Installing Older Plugin Versions](https://docs.nexcess.com/software/the-events-calendar/accessing-older-plugin-versions.md): Our team regularly releases updates to The Events Calendar and its add-ons, which can be installed directly in the WordPress admin of your site when they are av…
- [Why Am I Being Told My License Key is Out of Installs?](https://docs.nexcess.com/software/the-events-calendar/why-am-i-being-told-my-license-key-is-out-of-installs.md): Upon entering a license key into its corresponding license key field in your WordPress site's settings, you may be met with a notice that says you're out of ins…
- [System Requirements](https://docs.nexcess.com/software/the-events-calendar/what-are-the-system-requirements-for-your-plugins.md): Each of our plugins has its own system requirements but in general, this is what they expect: PHP 7.4 and above WordPress 6.6 and above WordPress.org has some g…