I used the 1TB image on a 3TB drive this morning and took some screenshots just to show the process. It worked like a charm.
Right click the partition that is 927.21 GiB and select Resize/Move
Drag the slider from the right side of the blue box all the way over to the right
Free space following should state 0
Now click the Resize/Move button
Click the green checkmark the apply the changes
Yes you are sure you want to apply changes so click Apply
Resizing partition
Partition resize is complete so click the Close button
Drive now shows 3TB in dashboard
