How to upgrade Qwt 5.0.1 to Qwt 5.0.2

Hi guys, I'm using Qt 3.3.5 and I have installed the Qwt 5.0.1. But right now I want to upgrade the Qwt to 5.0.2. I have downloaded the source code of Qwt 5.0.2.

Need I remove all of the former source code of Qwt 5.0.1 and the already compiled lib? Or can I install the 5.0.2 just like what I have done with the 5.0.1?

I am a freshman, so could anybody give some steps in detail to upgrade it?

Thanks a lot.

Just compile the new version the same way as you did with the previous one and then replace the libraries.