i have nethunter 1.2 installed in my nexus 7 wifi 2012 trough the windows installer.

i really appreciate if someone can tell me where or what is the procedure to install nethunter 2.0, should i install over mi current nethunter installation or i need to do a fresh install? in case of i need to do a fresh install it is just flash a stock room root the rom install twmp and install the zip ??

i really appreciate your help

Sorry for the bad English