Is the save game naming not working correctly for you?
Yes, unfortunately it's a programmatic limitation (unless anyone smarter than me knows a clever way of dealing with the problem). The scenes in the gallery need to work in any context. If you trigger the scenes from the main menu there's no active game context, so to speak, so a lot of variables (including the MC's name) aren't set. Everything therefore reverts to the default values.
Unset variables during replay are the most reported coding bugs during testing, because I always slip up somehow (cause I'm a sloppy amateur ).
The current build should have a setting to turn incest on or off, but only if you used the patch or uncensor command before. The setting in the game should override the patch, even if the patch is present.
The romance with Eva will properly developed in the second season.
If the Windows/Linux version uploaded here is the same one I posted on Patreon, you can just download that one. The Windows/Linux build is actually a combined Windows/Linux/Mac build (there's a TFTUV.app in the directory once unzipped). Saves me from building all those separate releases.