latest QT
win7 64bit
I keep seeing wallet address in "receive coins"
That's old wallet. I had two of them. One disappeared after deleting all the folders. And one stays.
A wallet is a collection of addresses (and associated data). You can't delete addresses from a wallet without special tools such as PyWallet. So it is highly unlikely that you have the same wallet but one address was deleted from it.
The best explanation by far is that this is a new wallet with a new address.
Please do the following:
1. Write down the displayed address.
2. Quit bitcoin-qt.
3. Delete wallet.dat.
4. Run bitcoin-qt.
5. You should now have an address in "Receive coins" which is different from the one you wrote down, indicating that you now have a brand new wallet.
Do this only if there are no coins in the wallet.
Deleting a wallet.dat file with coins in it causes a loss of those coins! (This warning is not only for you but for any random observers.)