As the last step of the GHI 4.2 installation package, the user has the option of updating firmware.
I just did an install and then wanted to update the firmware on my Spider, as the last step of installation. Before proceeding, I checked the target directories for the TinyBooter and the CLR. They were pointing at the 4.1 directories.
I would think that the default directories, after the4.2 install, should be to 4.2 not 4.1.
I found the 4.2 installer for the Spider, and then successfully updated to 4.2.