Ok.. firewall might be blocking connection or windows system blocking especially if in a windows protected folder.
Uninstall cigar box,
Reinstall cigar box into your documents folder.( Or to another non-protected folder).
Reinstall fsuipc.
Don't know what antivirus your using but turn off
When trying the reinstalled cigar box.
When you start cigar box, start and set to run as administrator and make sure you allow or ok the prompt to let cigar box through the firewall.
If you can't connect turn off your firewall.
Like our cigar box worked only 12hrs ago so something must have changed which prevented cigar box from starting and/or connecting.