Background: I love the atmosphere of the Chilla's Art games, but I hadnt been able to get them to display correctly on my ultra-widescreen, so I stopped playing them. (until now...)

No amount of adjusting Adrenaline, monitor settings, windows settings, the game's registry settings, the game config file or using things like Borderless gaming worked for me. The game would always launch scaled too tall for the screen. (Once in game you could never change a game option because.. the buttons were off-screen etc.) I finally found a fix (more like default launch options) and thought to share in case it helps you too.

Issue: The Chill Art game would not scale correctly and would crop off the bottom of the screen. This was most noticeable on the Main Menu and Options Menu, but also affected the game screen too.

Fix:
1) Right-click on the The Caregiver in your steam library.
2) Choose Properties > General > Launch Options (an open text field)
3) Copy / Paste the following into the launch options (or your adjusted version of it.)

Note: My screen is 5120 x 1440 (you could adjust these lower or to a pure window etc. I was most concerned about being able to see the full height.)
Launch options I used:
-screen-height 1440 -screen-width 2560 -window-mode borderless -screen-fullscreen 1

Just close out the properties and relaunch the game... and it should display correctly. I hope this helps someone else this Halloween season (or beyond) in enjoying Chilla's Art's older Unity Japanese Horror titles.

Wishing everyone the best and good gaming!
Irongut