You can only have one active license at a time.

In MikroTik RouterOS, each device operates under a single license that defines its capabilities and features. MikroTik RouterOS licenses are classified into different levels, from Level 0 (demo) license to Level 6 license, each offering different degrees of functionality and features.

Each MikroTik router can only have one active license at a time. This means that it is not possible to have active level 3 and 4 licenses simultaneously on the same device. If you need to change the functionality of a MikroTik device from one license level to another, you must upgrade the existing license to the desired level.

How do licenses work in MikroTik RouterOS?

• Level 3 License: Generally suitable for wireless access points (AP) or customer premises routers (CPE). It is not suitable for dynamic routing, hotspot, firewall, VPN operations and other advanced features that require higher license levels.
• Level 4 License: Offers more features and is suitable for small businesses or wireless access points with needs for dynamic routing, hotspot, firewall, tunnels, etc.

Change or Update License

If you have a device with a Level 3 license and want to access the features of a Level 4 license, you will need to perform a license upgrade. This process generally involves the following:

1. Purchase of License Upgrade: You must purchase an upgrade through MikroTik or one of their authorized resellers.
2. Apply the Update: Once you purchase the upgrade, you will receive a key that you can use to upgrade the license through the RouterOS user interface or using the online system on the MikroTik website.

It is important to note that RouterOS licenses are tied to the specific hardware (e.g. motherboard) for which they are purchased and cannot be transferred to another device.

Therefore, before purchasing a license upgrade, ensure that your device is capable of supporting the additional features that the upgraded license will provide.

Additionally, consult MikroTik's documentation or technical support for specific assistance to ensure the process is completed correctly.