And yes, Preferences > Hotkeys has been checked and the hotkey is assigned. Or in this case when testing with v12 it won't assign the hotkey stating something else is using it. The only other thing using Print Screen is the default OS Print Screen behavior.
Testing with v11 allows you to assign Print Screen and it just simply does not work. No message or anything. If you strike the Print Screen key it simply does the default OS screen capture function.
However, despite still getting that message about something else assigned to that key, I can now usually get the key to work properly, for some unknown reason. I don't know why it's started working again, and don't know if it'll stop working again also at some point. I would like to find out what the key is theoretically assigned to, why I'm still getting that error message.
http://www.nirsoft.net/utils/hot_keys_list.html (Nirsoft is safe and he has some KILLER utilities there)
So while it's no answer since I still dont know what *IS* holding it, windows *ISN'T* reporting it in use so why does Snagit?
I don't think I have the OneDrive app installed on this machine yet, but will investigate that.
So the culprit is Dropbox screenshots setting. The key is that after unchecking the "Share screenshot using Dropbox" box you still need to kill Dropbox completely, in order to be able to set your hotkeys in SnagIt back to default. Thanks again.
You can use Snipping Tool to capture a screen shot, or snip , of any object on your screen, and then annotate, save, or share the image.
You can capture any of the following types of snips:
Free-form Snip. Draw a free-form shape around an object.
Rectangular Snip. Drag the cursor around an object to form a rectangle.
Window Snip. Select a window, such as a browser window or dialog box, that you want to capture.
Full-screen Snip. Capture the entire screen.
After you capture a snip, it's automatically copied to the Clipboard and the mark-up window. From the mark-up window, you can annotate, save, or share the snip. The following procedures explain how to use Snipping Tool.To capture a snip
Click to open Snipping Tool.
Click the arrow next to the New button, select Free-form Snip , Rectangular Snip , Window Snip , or Full-screen Snip from the list, and then select the area of your screen that you want to capture.
So, I went to File-->Exit Snagit Editor for the Snagit 2019 Editor (blue icon) to exit. I did the same for the Snagit 2019 (red icon), File-->Exit TechSmith Snagit.
Thereafter I opened up the TechSmith 2019 and clicked red the Capture button and it worked again. I added my print screen as a Hot key again, tested and it worked fine. Problem solved.