How to activate Proxifier Standard Edition v4 CD Key?

Activating a Proxifier Standard Edition v4 key is really simple, just follow these steps: 

1. Download the software from here
2. Complete the installation and insert the key in the app 

The key is not working

If you have activated the key according to the guide but the code appears not to work, please check what type of error message you receive and depending on it follow the appropriate instructions:

• My key is Duplicated / Already used
• My key is Invalid
• My key is region locked / can't be activated in my country
• My key activated a different product