Tizen Developers

Got about same for myself when updating from 2.0 to 2.1 IDE. On update did make uninstall and then manually removed tizen-sdk directory also. I assume this causes my old certificate information to be still kept even actual referred certificate got deleted. So could not install anything and keep getting same error as you. FIX: I followed this instructions to create new certificate myfile.p12 https://developer.tizen.org/help/index.jsp?topic=%2Forg.tizen.gettingstarted%2Fhtml%2Fdev_env%2Fcertificate_generator.htm and then with help of following, removed old certificate profile and created new one w reference to just created p12 file. https://developer.tizen.org/help/index.jsp?topic=%2Forg.tizen.gettingstarted%2Fhtml%2Fdev_env%2Fsetting_author_certificate.htm

Thanks for rply.. sry i want to clarify that have u completely remove the Tizen 2.0 and install Tizen 2.1..? and its works for you?

and one more think i could't find Preferences in my window tab..

ignore the above comment.. i had found the Preferences.