How to transfer keyboard shortcuts (keymaps) between recent versions?

Hi! I have very strange problem - I cant transfere the user defined shortcuts aka keymaps from one version to another! I tried with export key configuration and then import key config, it doesnt work! Save as default and opening the same file in the new version doesnt work too! In the earliest versions there was a .blend file with the default user settings that you can simply copy from the previous version and paste it inthe new version! but I cant find this file nowhere, neither i found other way around.
Please, someone help me! every time when i want to update to a new build i have to send one whole day of reconfiguring the shortcuts(the default shortcuts are not an option for me), but I think this problem sould have an automatic solution!