A known quirk with 3CDaemon on modern Windows operating systems is that the default TFTP/FTP upload and download directories can spontaneously reset or fail to save.
The original 3Com website is defunct. Use a trusted source like , Softpedia , or an internal IT repository. Look for version 2.0.10 (the most stable release). Filename typically: 3CDaemon_setup.exe (approx. 5 MB). 3cdaemon windows 11
3CDaemon stores .ini files in its own directory. If installed in Program Files , Windows virtualization redirects changes. Fix: Reinstall to C:\3CDaemon . Also, right-click the EXE → Properties → Security → Give Full Control to Users or Everyone . A known quirk with 3CDaemon on modern Windows