![](http://mongoowl.citsoft.net/wp-content/uploads/2013/09/register-license-title-300x39.png)
If you have purchased a commercial version of mongoowl, please register licence of monoowl as following.
![](http://mongoowl.citsoft.net/wp-content/uploads/2013/06/step1.png)
Please click the red area at the bottom of the login screen to register a license of mongoowl.
![](http://mongoowl.citsoft.net/wp-content/uploads/2013/09/Register-License-01.png)
![](http://mongoowl.citsoft.net/wp-content/uploads/2013/06/step2.png)
After step 1, you can see a license window as below figure. Please enter the license key received by email when you purchased. If you lost your license key, you can find license key at ‘Find license‘.
![](http://mongoowl.citsoft.net/wp-content/uploads/2013/09/Register-License-02.png)
The below figure is a error screen that appears when you enter an invalid license key. Error messages are as follows.
- License key is required.
- License key is invalid.
- Cannot connect server.
- A mongoowl returned error information for requests.
![](http://mongoowl.citsoft.net/wp-content/uploads/2013/09/Register-License-03.png)
![](http://mongoowl.citsoft.net/wp-content/uploads/2013/06/step3.png)
If the license key is registered correctly, it indicates that it is a commercial version with license key you entered as shown in the figure below.
![](http://mongoowl.citsoft.net/wp-content/uploads/2013/09/Register-License-04.png)
The display method of mongoowl is different depending on the version of the commercial and non-commercial version as following figure.
![](http://mongoowl.citsoft.net/wp-content/uploads/2013/09/Register-License-05.png)