Some noob questions about the wallet..
Do I have to update or install the new wallet?
Or can I just stick with the older version?
+ How do I update without losing the coins in my old wallet?
When I update, I just get the new file. I delete the old one and then load the new one. It updates it and keeps the wallet.dat file so that you don't lose anything. I always backup the wallet.dat beforehand though, just in case. I'm not sure if you can keep the old one though.
Notes on Backing UP: the coins in your wallet are attached to the wallet addresses which are created by the QT software... So it is ESPECIALLY IMPORTANT TO Backup your wallet WHENEVER you CREATE NEW ADDRESSES in the Wallet, as coins are literally attached to / "owned" by these wallet addresses. What this means is... if you haven't creates any new addresses since the last wallet backup all coins credited to those wallet addresses will appear as the blockchain downloads. -digeros.