I have downloaded the mongoDb community server, and I only find this file in /bin folder:
Apologies, you may have to change the package on the download page to shell:
On a side note, a colleague of mine has mongodump v100.3.1 and mongo v4.4.4 and he was capable of successfully dumping the db.
Glad to hear it worked for your colleague. If you do end up finding the solution regarding your own system (whether re-installation solved it), please update this post here.
Apologies I was not able to help further.
Kind Regards,
Jason