First install Mikroc Pro from their official website. You can download Mikroc Pro For PIC v5.8(as I am using this). Install it into the default directory.
Then Go to download section at the top of this page. Download the mikroe.rar file. Extrat this file.
Open the extracted file and go to KeyGen->mikroC PRO for PIC.
You Can find a app named keygen. Copy this app to the installation directory.

Then double click to keygen app it will create mikroC_PRO_PIC.key
file.
Now open the mikroc pro app and look that it is now a registered version. You can now exert a hex more than 2k.
Enjoy!!!!