It happens that sometimes you download a software for a 30 Days trial and you cannot run it forever. Here, you will find various ways for extending the duration of using this software. When you are using a trial software, you can run it with limitations. If you extend it by using the following ways, it will still remain in limitation.
Please note that the methods have been suggested for the users who wish to use the software for more than trial period of time and then they want to buy it. I would personally recommend you to buy the software if you like it. It will help you for keeping the software up to date.
If you want to use the software even after its trial period, you should contact your software vendor and inquire about the extended evaluation time. He will surely entertain your request of extension and will provide you some more time.