Process Explorer file showing as corrupt during installation?

I am able to download a paf file of Process Explorer from Portable Apps, both online and from within the Portable Apps itself, but when trying to install to my USB drive, the installation always fails with a message that the file is incomplete or corrupt. This is not a download issue on my end. I am having zero trouble downloading other files from Portable Apps or anywhere else and using them. Is Process Explorer 16.01 not going to be supported as a portable app? Thanks in advance!