I think I've found an undocumented command line argument that fixes the problem.
It is "-rip".
So here is what I did (from the directory where expressrip is, which makes the example shorter):
C:\Program Files\NCH Swift Sound\ExpressRip>expressrip -hide
C:\Program Files\NCH Swift Sound\ExpressRip>expressrip -rip
C:\Program Files\NCH Swift Sound\ExpressRip>expressrip -exit
C:\Program Files\NCH Swift Sound\ExpressRip>
Obviously, I could have executed from any directory, by fully-qualifying the expressrip name. But abecause of the space in "program files", you would need to enclose the fully-qualified file name in quotation marks.
Dave Straayer