Hello i have bitcoin core 0.9.2.0 on my pc, and i want too update too 0.10.2 because of the recent news about the fork problem.

1- can i update straight too version 0.10.2?
2- how do i do that? just instal the recent core version (0.10.2)?
3- i have to copy firts the wallet.file in to a pen from my current version if anything bad happens?
4- after i instal the 0.10.2 i dont have to do anything else?
5- the core is 0.9.2.0 is encrypted, shoul i desencrypt first?

Thank you