Hi HCLivess, new version(0.84) installed everything worked good  ATM node synchronized very fast and my wallet didn't change:       f246e1b8d75e16e9451d6d8f22e63196c41ed26af7abd4f87fb3f44c . Yes I have windows 7 but I don't know why my wallet was overwritten in the prior version.
OK waiting for some test coins to try mining tool. Thanks.