Missing mfc120u.dll

Probably your anti-virus software has a false positive on this file and puts it into a quarantine or deletes it. Add it to exception list of your anti-virus and/or contact the maker of that anti-virus to fix the problem.

There are no files missing in HyperSnap 8 setup. All are installed correctly. If not Symantec, then something else must be deleting this file from HyperSnap 8 directory. I cannot guess from far away what it is. Please contact some local computer guru who will have access to your machine and can examine what really happens.
 
Also, the same anti-virus on one machine may have different anti-virus database than on the other. Maybe the error in Symantec was already fixed, so try reinstalling HyperSnap 8 from a fresh download from our web site. If they fixed the error and updated database, it should no longer delete that DLL.

You can hide tools from the ribbon with "Customize..." function. Here is how to do this interactively, then you could observe the changes it does in the registry and maybe write a script to enter such change for other users (note: if you change registry settings of HyperSnap 8, the program must not be running at that time):
 
On the "Quick access toolbar" (left side of the title bar) click the right-most button with triangle pointing down to show "Customize" menu. Click "More commands" in that menu. Click "Customize Ribbon" in the left hand panel. In the right-most panel, make sure that "Main Tabs" are selected at the top. Below it, expand "Image" branch. It will have 5 sub-branches, the last one without any title. If you expand this untitled branch, you'll see "User tools...". Click to highlight that untitled branch immediately under "Image", then click "<< Remove" button in the center, click OK. The "User tools" button will be hidden. If you want to examine what changes were made in the registry, first exit HyperSnap 8 completely via File/Exit menu, then look at this key and sub-keys in the registry:
 
HKEY_CURRENT_USER\SOFTWARE\Hyperionics\HyperSnap 8
 
It will be probably somewhere under Settings80 key, but I don't know where exactly, some binary values ...
 
Greg

Also, "Save CFG" function under the Settings ribbon tab saves all the same info to a text .ini file, so saving before and after hiding the button and using a text comparison tool could make it easier to find the exact entry that's changed. Note that this text file is in Unicode, UTF-16 encoding, so make sure to use text editor or text diff tool that will handle UTF-16 correctly.