You can use it lifetime. You need to reset trial of IP change easy only once.
Below is method: –
First open RUN command prompt and type regedit in it and open it. Now you are on registry editor.
In the EDIT menu, you need to click upon find option and type ip change easy and find folder of it.
You would find changeshicishu2 registry file, so open it and type 0 and save it.
Now you can use unlimited without any worry.