For anyone who, like me, was not able to install the updated wallet prior to the fork, this is what I had to do to get my wallet back up and staking

1. Close the current NavCoin Core version running on your pc

2. Next and most importantly, make a copy of your wallet.dat file located at...... C:\Users\your_username\AppData\Roaming\NavCoin4

3. In the control panel, uninstall the NavCoin Core software currently installed on your pc

4. Delete the entire NavCoin4 folder in your Roaming folder

5. Install the NavCoin Core v4.1.0 and allow the blockchain to resync

6. After sync has completed, close the wallet and replace the wallet.dat in the Roaming folder with the wallet.dat which you already saved in step 2

7. Reopen the wallet and, if completed correctly, you should see your coins again


Hope this helps for anyone who is currently having issues getting back up and running