It looks like this might be an issue with a Windows 10 update. I did a bit of searching and came up with this post: https://steamcommunity.com/discussions/forum/1/1480982971174752598/
which talks about changing the aspect ratio of the Nvidia graphics card.
Another post mentions the fix for the AMD Raytheon card:
"I went to AMD Radeon settings and under 'display' changed scaling mode from 'preserve aspect ratio' to 'full panel'. Worked perfectly for me. Games are running again."

Try these, depending on your graphics card, and see if they work.

Jun 30 2018, 8:02 PM · client

Jun 29 2018

Rattletrap closed T2001: Cannot Equip any new Items as Resolved.

Closing this up since there has been no activity on it in over a year.

Jun 29 2018, 2:59 AM · client

Jun 28 2018

Rattletrap closed T1087: Quest markers should always be oriented up as Resolved.

This issue has been resolved in recent builds.

Jun 28 2018, 6:54 PM · client

Rattletrap closed T1805: Unable to Find Spawn Position Message as Resolved.

Jun 28 2018, 6:49 PM · server, client

Jun 27 2018

TobiasofTantalus added a comment to T608: Equipping a hat after a hat is equipped does not replace hat.

Close enough I'll add this here

Jun 27 2018, 2:39 PM · client

May 7 2018

StringCheese added a comment to T2242: Item coloring does not like certain colors.

It affects any sort of coloring. Clicking doesn't seem to have any affect on it, as hitting enter to set the color does the same thing. Ponycode importing is also affected by this bug.

May 7 2018, 8:12 AM · client

StringCheese updated the task description for T2242: Item coloring does not like certain colors.

May 7 2018, 8:09 AM · client

May 6 2018

Maze added a comment to T2242: Item coloring does not like certain colors.

I have seen this happen many times and it is a pretty annoying glitch because it causes colored items to not stack even if they look the same. I have to keep checking the color codes to realize they don't match up.

May 6 2018, 1:59 PM · client

garophel lowered the priority of T2242: Item coloring does not like certain colors from Needs Triage to Low.

Is this happening with two color coloring or with single color as well?

May 6 2018, 1:08 PM · client

Apr 4 2018

Rattletrap closed T2007: Antlers, Nose and santa hat in preview as Resolved.

This issue has been fixed in recent builds. Closing it up.

Apr 4 2018, 11:09 PM · client

Mar 26 2018

Rattletrap closed T1349: Can't move or chat or interact as Resolved.

This issue has been superceded, since numerous updates have occured since it was created.

Mar 26 2018, 11:09 PM · client

Mar 20 2018

Cerothus added a comment to T2002: Problems Launching the Game (Black Screen on Launch).

Unfortunately, I have tried that. For the sake of thoroughness, I just attempted it again and am still getting the same results. Thanks for trying though...
It has to be a corrupt file somewhere; one that isn't getting erased when I uninstall the game. Unfortunately, I don't know where I would even begin to look for something like that, or how I would fix it.

Mar 20 2018, 2:11 AM · client

Mar 19 2018

Aster added a comment to T2002: Problems Launching the Game (Black Screen on Launch).

Have you opened %AppData%\..\LocalLow\LoE\Legends of Equestria and tried to delete VideoSettings.json?
If you delete it, and try to launch the game (essentially default settings), does it resolve the issue?
If that still doesn't work, does deleting %AppData%\..\LocalLow\LoE in its entirety resolve it?

Mar 19 2018, 4:23 AM · client

Mar 13 2018

Cerothus added a comment to T2002: Problems Launching the Game (Black Screen on Launch).

My problems all started when the Holiday update came out. Something in the update screwed everything up and now I haven't been able to play the game since Dec 22nd!
I'm getting really mad! I have done EVERYTHING I can think of, and everything everyone else has suggested to get the game to work with no results. At this point, I'm ready to give up on the game altogether. It's not worth all the frustration and getting my blood pressure up over.

Mar 13 2018, 1:14 AM · client