Ok so currently i have pac wallet on mine machine(ubunu 16.04) and i`m trying to install the new wallet, but the problem is that the old one is already created .paccoin folder, so by installing new one, i`ll override this folder which will be a problem. Does anyone facing this problem, or if its not can you give some contact to ask somewhere :?
As a rule, simple wallet upgrade does not need to change blockchain files and you can simply download the new wallet client and run.
To be safe, always go to & to save a wallet.dat file.
You can also save a copy of the whole blockchain file folder:/.../paccoin/ and rename it to such as C:/.../old_paccoin/.
Even safer, you can go to console, get your private key by using in the old wallet client & in the new wallet client .How I can open the wallet console?
Go to the Help menu and then select Debug Window, once you are there go to the Console tab.
See: https://wallets.paccoin.net/#faqShould I backup my wallet?
Its important to make a copy of your wallet and of your private keys. In order to backup your wallet you just need to go to File -> Back Up Wallet and the save your file in a USB or offline source to keep it safe. As for your private keys a recommendation is to write them down and store it in a secure source.
Tip: Keep your coins on your wallet always not in exchange.
In case you have to import you wallet.
I have a backup of my wallet, how can I do the import?
Paccoin app has an export feature, but not an import feature, importing a wallet is a simple manual process on which first you need to localize your Paccoin app folder:
Windows: C:\Program Files (x86)\Paccoin
MacOsX: ~/Library/Application Support/
Once you find your folder, locate the wallet.dat, backup that file and replace it with your own backup, always make sure that the wallet is not running when restoring a backup of your wallet.dat.
Hope that these are helpful.

Thanks, Ill keep this handy.
What do we save the file as, meaning how to open it? As when I save it it save it under my freaking browser. Which cannot open the file. How should these be properly saved to open and read in order to reopen later as well as saved as backups. I can change how to open it on properties, but not sure this is accurate. I changed them all to word file.