Go to Web Wallet https://myzenwallet.io/
In case if you already have some funds in your web wallet you can skip to "Private key export"
I’m using my Swing wallet.dat as an example
If you have a wallet.dat file you can import it, this wallet and your funds will appear immediately, you don’t need to wait for synchronization. This file can be found here in case of Swing wallet->
This picture contains full path to this location, where you can find wallet.dat file.
in case of WIN OS
For Linux /appdata/roaming/Zen is ~/.zen
For Mac /appdata/roaming/Zen is ~/Library/Application Support/
This file is one you must copy on safe place!!!
Notice if you lose this file you can lose your funds.
Load your wallet.dat file.
After wallet.dat is loaded you can see your funds, but only in transparent addresses.
All addresses are listed and you must scroll down to find one with funds as in my case.
Private key export
If you need private key export, just go to export and select address with funds and similar picture will appear, you will get your private key.
Notice that this field and q/r code is marked and protected, because I dont want to share my priv key with no one!