Move (or Copy) the project files from $1.4.0_INSTALL$\Projects\ble\$PROJECT$ to $INSTALL\Projects\ble\$PROJECT$ where $1.4.0_INSTALL$ is the top level installation directory of the 1.4.0 stack, $INSTALL$ is the top level installation directory of the 1.4.1 stack, and $PROJECT$ is your project folder.
If you modified any files from anywhere outside of the application folder, such as in the profiles at $1.4.0_INSTALL$\Projects\Profiles, you will need to merge your changes with the new 1.4.1 version.
Open your project (now in the 1.4.1 folder) with IAR 9.10.3.
When prompted, choose yes to convert for use with new version.
In the Project options, in the Preprocessor options under the C/C++ Compiler tab, add “CC254x” to the controller include path: $PROJ_DIR$\..\..\..\..\Components\ble\controller\CC254x\include
For any profiles, add the CC254x include path. Do not delete the original paths as they are still needed. Using SimpleBLEPeripheral as an example, add the following paths: $PROJ_DIR$\..\..\Profiles\SimpleProfile\CC254x $PROJ_DIR$\..\..\Profiles\Roles\CC254x However, do not delete the original paths: $PROJ_DIR$\..\..\Profiles\SimpleProfile $PROJ_DIR$\..\..\Profiles\Roles
Replace the .c files that were affected by the changes in step 6 by deleting the old reference and adding the new file. For example, delete peripheral.c from the SimpleBLEPeripheral project (under the PROFILES group). Then add peripheral.c from $INSTALL$\Projects\ble\Profiles\Roles\CC254x.