I downloaded & installed version 2.2 electrum but, it remains version 2.1.1 ??

Hello,

Today I have noticed that Electrum 2.2 version has been just released. So, I have downloaded it & install it (Before doing this I uninstalled the old version 2.1.1). But, after successful installation I open my electrum and found that it remains version 2.1.1. I also couldn't find any new features in this version. But, in the release note it says --

# Release 2.2
* Show thousands separators in GUI
* Show unmatured coins in balance
* Fix exchange rates plugin
* Network layer: refactoring and fixes

version 2.2 signature :

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Version: GnuPG v1.4.12 (Darwin)

iQEcBAABAgAGBQJVXNwEAAoJECJFMARpVQb9X90H/RUA60/WHHz8OblFtZ7doQJu
gfmHcd/PdXg9EwMXxooCrj2rPKyxpGNXfl+Q2J9McseSNmVxRdoMEq3SVAAtkVXe
cEOTNTVBvDHyrMUMUKOy9mYAx/BNfYUnXjSW5FqDLGQ3SVEzFTUUCcOsJhcRZ2s9
dYG2+PubfqE2KOt23oqsdA1ppMZTrShzlRK1q+/4B1GiM/zHagyD+PoKnuODrLAY
3YWJzMvrQFIcDo40urShyXNKGG1cX4sYrzIIgxzsdmr4iorxhNmgxIGOE4yUeD5b
/GDABpBOB/EmjmvkKofHjnsMT+Jc6FiChMGkzatnBbQfJhJ/88zKLoEoVqYwdlA=
=Ilnc
-----END PGP SIGNATURE-----

Did you face this problem like me ?

I am so confused .......