You can download a evaluation for 30 days, and depending on the license that you have you can or you can not update that license to Codewarrior 11.
But first, download and install the evaluation version and once you have installed you can go to your software license and support on your profile and check if you have the option to update your license

then go to software account

then check the options that you have to activate code warrior
Regards
Vicente