Framemaker 11, unable to copy table cells.

Good day everyone. My company uses unstructured FM 11. A co-worker of mine is unable to right click and copy table cells. He can highlight text in the cell, and right click and copy. But when he selects the entire cell, and right clicks, the option to copy is greyed out. The keyboard commands of Ctrl C and V work fine. It happens in all FM file he opens. However, when he swaps to Structured FM, the option returns. I have opened the same files, and everything works fine for me in both unstructured and structured. Has anyone encountered such an issue?