there is a copy of filezilla server 0.9.5 on archive.org. this would run on 95osr2 unlike 0.9.14a, but the interface was glitched and when clicking anywhere, the program would crash with a comctl32.dll error.
totally unrelated, i was installing the 3.0 software for the ms sidewinder gamepad (swgameen.exe), and while it was copying files noticed said comctl32.dll. it updated the file to one dated 1997 and with this (possibly other stuff as well), it ran fine. out of the box, i could copy with the folder structure intact, directories were displayed correctly on the client and transfer speed was good. the only minor downside was, i was not able to set it to accept blank usernames, setting up a username with all the permissions was always needed to connect to it, however no password needed to be set.
looking for any version between 0.9.5 and 0.9.14a now, to find out which is the latest that will work with win95. interlockedcompareexchange is a win98 function so 0.9.14a is definitely out, probably a great option for that OS though.
edit: to not have to install an IE update or something like the aforementioned one, microsoft had redistributables for a slightly newer 4.72.x revision than the previously mentioned one, along with a newer 5.80.x that should still work under win95 (some version history here and here). according to MS, 401comupd.exe should not be run when IE 5.x has been installed before.
note: as per Q221836, there was at one point a bug with the former version of the two where if the file had already been updated to 4.72.3110 or later, it would delete that file, rendering the OS unbootable. it's said that they fixed this in a version that updates to 4.72.3611.1900 instead, however, the version number for every archived 401comupd.exe download i came across remains 4.72.3110.0. as Q186176 as of july 20, 1999 already referred to that newer version, it's highly likely this is the fixed file and they just forgot to change the version on the installer itself, but to be totally safe one may still want to check the currently present version before updating, or simply go with 5.70.
edit2: comctl32.dll 5.80.x is mentioned as eating up too many system resources over time here, which likely concerns the build linked above. a slightly older 5.80.x revision is suggested to fix this. 5.80.x is apparently needed for newer programs that still work under win95, like 7-zip 9.20.