Yes when you download or upload in this case a program from the MSU you lose the names of the buttons. When I run into the scenario that you mentioned I upload the program, fortunately you have a working system with to start with, After uploading the program, rename the master keys inside the uploadd program.
You will need the Intellicontrol remote for this as each Master Key should have a transparent label. ie
Master Key 1 - CD etc. You can highlight the name by a left moluse click then rename. By starting this it will
allow much easier future updates as it seems you ve
taken ownership of this intellicontrol. Continue the same for the other function buttons. Use your tool box for the needed codes. Good luck