Currently using Win7 SP1 64bit on a VM. Bottom of screen is not shaded and cannot be selected using mouse button.

Are you using latest ShareX version?
Yes, 10.6.1.
Not sure why it happens. Maybe only happens in VM?
Seems like yes... I tried on my Win10 (native) and it does not have this issue.
Hi I have same problem too. This is a problem that exists from a long time ago (at least more than half a year ago)
now on ShareX 10.7 Release Windows 8.1 Pro(Not VM)
Long time ago it was exist and I could reproduce it too and after fix it many people was reported it is fixed. I never managed to reproduce it after that day. And without be able to reproduce it I can't find why it happens to very few people (otherwise countless people would have reported it).
11.4.1 portable exist, win7 x64
i've same error reproduce in win7, win10
there system using intel hd graphic series. (skylake, ivybridge)
12.0.0 exist, win10 x64, 1920*1080
I can only select top 996 pixels

It is already fixed: https://getsharex.com/docs/dev-builds
@Jaex Hi this issue still occurs on Win7-64bit. On the desk screen I can only capture 997 pixels in height.

Besides, I there seems no pre-release update option as is instructed on https://getsharex.com/docs/dev-build in application settings.

Thank you.
That option only exists in desktop build. You can't install it on Steam or Windows Store.