As far as I know bitcoinqt was renamed to Bitcoin core after version 0.9
Thx for your reply.
So do you think I just have to run bitcoincore setup oon my pc and it will replace old QT version?
thx again for your help
Here is your answer:
https://bitcoin.org/bin/0.9.0/README.txtQuoting:
If you are running an older version, shut it down. Wait until it has completely
shut down (which might take a few minutes for older versions), uninstall all
earlier versions of Bitcoin, then run the installer (on Windows) or just copy
over /Applications/Bitcoin-Qt (on Mac) or bitcoind/bitcoin-qt (on Linux).
If you are upgrading from version 0.7.2 or earlier, the first time you run
0.9.0 your blockchain files will be re-indexed, which will take anywhere from
30 minutes to several hours, depending on the speed of your machine.
On Windows, do not forget to uninstall all earlier versions of the Bitcoin
client first, especially if you are switching to the 64-bit version.