I also use Kiwi on my desktop machine to collect some logs from my home MikroTik box.
I have deafult rules (one is to display in your Kiwi client, another one is "Log to file"), and I've edited "Log to file" to make different files monthly by entering "J:\path\to\folder\%DateY4-%DateM2 NAME FOR YOUR LOGS.txt" to file path. Apart from that, I've entered DNS settings and set it to listen on UDP port:
On MIkroTik I've set remote logging facility to match
Note that I've allowed both Kiwi's exe files in Windows firewall:
C:\Program Files (x86)\Syslogd\Syslogd_Manager.exe
C:\Program Files (x86)\Syslogd\Syslogd_Service.exe
These are the files that KIwi writes on my hard drive:
2012-11 EDITED NAME OF LOG FILE.txt
2012-12 EDITED NAME OF LOG FILE.txt
...
2017-06 EDITED NAME OF LOG FILE.txt
2017-07 EDITED NAME OF LOG FILE.txt