Good afternoon,
Pardon me asking but if I may ask, did you by chance just drag and drop the Feral-Heart from your Windows 7 computer to your Windows 10? If that's the case, that may be where the disconnection is manifesting from. I, myself got a Windows 10 Dell laptop recently and faced the same issue. If you haven't already attempted to re-download the game, calling it something different than the Feral-Heart files you brought over (as you don't want to lose/merge one), may I recommend it?
It may not do much but if there's newer files or ones Windows 10 will download automatically to support Feral-Heart, it'll bring it over during the download. This doesn't mean you cannot keep all older information from your Windows 7 Feral-Heart. Just drag and drop in the correct folders and redo an .cgf files (aka markings/items/sounds/weather) you may have dabbled in prior to the switch.
If what I spoke wasn't the case, I would still recommend re-downloading it.
- Angarika/Blakyhart