If I remember rightly this program is also NOT plug and play in that it does NOT automatically arrange the necessary port forwarding for the vast majority of us behind a NAT router, that will have to be done MANUALLY via a UPNP utility or via the routers admin pages.. which is a good thing as you really don’t want this single threaded web-server exposed to the public internet. Personally if I wanted to access my files while away from home I’d put a copy of them on the machine I am taking away from home… it saves time and bandwidth and security concerns and if they were private and I don’t want them to be known if my device was stolen I’d make sure they were securely encrypted at all times by something like Vera-crypt that can access them with the passphrase but always leaves the data encrypted.
It appears this was “designed” back in the day when we used discrete modems even USB ADSL Modems that gave the host windows PC a public IP number so there was no need for port forwarding and windows often exposed its soft underbelly to the internet for anyone to access. There was no concept of security back then just as there is no concept of modern security in this program.
NOTE the web-server is NOT a service like a pro web-server but a normal user desktop program so if your computer is attacked and probed for buffer over-runs and resource depletion attacks and it causes the machine to reboot the web-server will NOT restart by itself as the user account has to be logged back in and the program re-started.