Today I ran into the issue on a new notebook that I was not able to run the KYRTOOL.EXE from the Notes program directory.
I copied over the 64bit version ( Windows 10 Pro 64-bit ) and always received the following error message “The application is unable to start correctly (0xc000007b)…”.
After some investigation I just copied over the 32bit version of the KYRTOOL.EXE and everythink was running fine again. Solution is very ease >> IBM Notes is a 32bit application and therefore you have to use the 32bit KYRTOOL.EXE.
You can download the tool here: https://ibm.co/2GmJ4iA