The utility will only look up information relevant to troubleshooting installation and license management problems, and will not collect any other information from the PC in question. It will write the result to a file which is in human readable form. Thus can you see and study the contents before sending the information to IAR Systems.
Download the tool from the link: IAR License Diagnostic tool.zip.
It is perfectly okay to run this application several times. If the file IAR_diagnostics.txt already exists, it will append the new information to the file.
There is one more file that needs to be sent to support. It is the file named lms.log. The file is found in the directory of : ...\Program Files\Common Files\IAR Systems\License