1PXQDfaRZykDRwAo8fzdrBusj4TX3wtETc
https://blockchain.info/address/1PXQDfaRZykDRwAo8fzdrBusj4TX3wtETc
The 89 Bitcoins were sent through a series of addresses and transactions to 1FbzoaAJnXyDbj4a9nWFa61MCogz5WNHwX yesterday. Is that one of your addresses?
The first thing you should do is backup your wallet.dat file from your Bitcoin core v0.8.3-beta wallet. Follow the instructions in the quote below to do that.
Click the windows start button, then copy and paste the line of text below into the search box that appears, then press the enter key to open the folder containing your wallet.dat file.
%appdata%\Bitcoin
This is what your search box should look like after you have copied and pasted the line above into it.
Backup the wallet.dat file, it's all you need to secure your Bitcoins.
Now you need to get all the private keys that wallet.dat file contains. Later versions of Bitcoin core have a dumpwallet command to do that, but I don't think v0.8.3-beta had. Certainly v0.7.0 hadn't because I have that version archived, and tested it.
There is an easy way to get all the private keys in your wallet.dat by importing into a newer wallet and using the dumpwallet command. However, if you don't correctly back up your wallet.dat first it might overwrite the wallet.dat containing your coins and destroy them all. It's safer to use the method detailed below.
After you have backed up your wallet.dat you can click the "receive coins" tab in your Bitcoin v0.8.3-beta wallet, then keep clicking the "new address" button until you have about fifty addresses. Next, use the dumpprivkey command in debug mode to get the private key of each of those 50 addresses. Import those 50 private keys into electrum and check if any of your Bitcoins show up.
If that doesn't work then click the "new address" button another 50 times, get the private keys, and import them into electrum. Your Bitcoin v0.8.3-beta wallet contains a key pool of the next 100 addresses it will use, and if you have clicked the "new address" button 100 times your wallet will show all of them. Unless you changede your wallet's settings it should have the default 100 addresses in its keypool.
This post explains about keypools.
The wallet.dat contains, by default. a key pool of the next 100 addresses your client will use. An address is consumed each time you click "New Address" and then each time a change transaction (back to yourself) is made it pulls one address from the key pool. The keypool is topped up after each time an address is drawn from it. (with a few exceptions).
So you as long as your backup is newer than the past 100 transactions it should have all the keys in it.
edit
After taking a closer (magnified) look at your screenshots I realised that electrum wallet with five private keys imported into it should be empty.
Try importing the private key for the 16JrYHfgUfjSEFFarPFVvZtexW3oUETXqh address that contains 190.9995475 Bitcoins if it's one of yours.