Lenovo is also what was causing the problem for me. Here's a more explicit guide on correcting it.
https://forums.lenovo.com/t5/Lenovo-Vantage-Knowledge-Base/Screenshots-and-Snips-have-an-unnatural-orange-tint/ta-p/4522439

There are a few different things that could cause this. I'm no expert, but I spent quite a bit of time researching this issue for my own computer. Here's what I found.

It could be caused by another program absorbing the f.lux color profile. See the troubleshooting section in their FAQ for more info.
https://justgetflux.com/faq.html

Windows 10 has its own tinting software called night light, if you're using Windows 10 I recommend you check that.

Lenovo preinstalls software onto their machines that can cause this issue (this was the issue for me) here's a guide to correct it.
https://forums.lenovo.com/t5/Lenovo-Vantage-Knowledge-Base/Screenshots-and-Snips-have-an-unnatural-orange-tint/ta-p/4522439

I don't doubt there's more, but that's what I'm aware of.

@usedtobeafan I have a LENOVO laptop, and this fixed my issue definitely.

It works not only for Snagit, but also for Snipping tool....

https://forums.lenovo.com/t5/ThinkPad-X-Series-Laptops/Snipping-Tool-Has-Orange-Tint-Now/m-p/4519494/highlight/true#M104764

I did first look at this solution, but it didn't help me:
https://support.techsmith.com/hc/en-us/articles/360027625811-Snagit-Windows-Yellow-Tint-in-Captures-from-f-lux

Hi can you try 4.111 also? If you post driver info from there it will give more information, and it might fix your problem also.

Thanks - we will add it to the list. Honestly we are always looking for more hotkeys, and ones that don't conflict with other apps are kind of hard to find!

We can add some more desaturate options.

See here:
https://forum.justgetflux.com/post/22207

The only thing I can think of is, turn off Night Light (the Windows feature).

18932 seems to be the July 3 insider build (so it's 3mo old if I've got it right?) Are you seeing this on newer ones like 18970?

You can make the screen more warm during the day using the "daytime" slider.

However, staying the same really is not what we're trying to do with f.lux. We think lights should change from day to night, it's the signal our bodies and eyes need to tell day from night.

There are some fixes in 4.111 for fullscreen disable and multiple GPUs.

The latest Windows update has quite a few bugs, and we've been working around them as we find out what they are exactly.

If you click the "overflow" (up arrow) in the notifications area, you can drag f.lux out of there into the main list. Does that help?

Okay we think in the latest version (v4.110) displaylink's "gamma ramp" registry fix should now be fully supported.

I have been looking for such an option, thinking there was. However I was unable to find it. However - I just found it to be under the "disable" menu instead of general preferences. Thank you so much.

Thank you for this - we are following up and it seems like the current situation is not working for both old and new adapters at the same time.