These are the final download statistics for FET-5.37.2, from 15 August 2018 to 8 December 2018 (about 3.75 months):
1) From https://lalescu.ro/liviu/fet/
Number of different IP-s to download fet-5.37.2 (exe or tar.bz2): 11501
of which: Number of different IP-s to download fet-5.37.2.exe: 9871
Number of different IP-s to download fet-5.37.2.tar.bz2: 3032
2) From https://www.timetabling.de/
Downloads of fet-5.37.2.exe: 1845
Downloads of fet-5.37.2.tar.bz2: 919
3) From https://sourceforge.net/projects/fet-timetabling/
Probable number of different IP-s to download fet-5.37.2 (exe or tar.bz2): 6672
Downloads of fet-5.37.2.exe from 15 August 2018 to 17 November 2018 (missing from 18 November 2018 to 8 December 2018): 5158
Downloads of fet-5.37.2.tar.bz2: 893
4) From https://abmathematics.com/?page_id=966 via https://lalescu.ro/liviu/fet/toolslinks.html, FET compiled for Mac OS X by Darren McDonald
Downloads of fet-5.37.2.zip: 540
Notes:
a) At (1), there are IP's downloading both the exe and the tar.bz2.
b) I cannot count: Other sites which host their own FET archives for users to download, and GNU/Linux installs by their repositories.
c) Not included: the downloads for the custom versions (Morocco, Algeria, mapr, and the rest of them).