I am unable to access the brightness option from the Image tab. In fact, all of my options in that tab are greyed out except for Display mode and Rest.
I have tried the Installation->Reset to no avail.
Followed instructions. Manually uninstalled Promethean/ActivInspire.
Reinstalled Version v2.17.68075
Same result Only WORKBENCH in Promethean Folder.
Mac OS X 10.14.6
And whatever the latest version is when one goes to download ActiveInspire from the PrometheanWorld Website.