XDesign Sketching Issues

Hi there, 

I am having some issues with XDesign that make the program unusable, I haven't encountered these issues previously and have changed nothing in my settings.
One day to the next I have gone from being able to create a simple sketch to specific dimensions, to the sketches no longer being valid and dimensions being unable to be set.
The sketches, even when they are not flagged as problematic in red, are still disappearing as soon as I click the tick to finalise the sketch. 

Interestingly, I can start, for example a circle, type in my dimensions and press enter. The circle will then show a dimension locked in but highlight as red; when I move the curser the circle changes size to match the curser yet keeps the same dimension listed. Saving the sketch means I lose the sketch, currently the program will only allow me to sketch rectangles successfully. Below is a video of the sketching issues that I have been having.
Can anyone help me to understand how to work around this or if there was an update or something that might require me to change some settings? I cannot for the life of me figure out why I can no longer make even simple sketches beyond rectangles.

Thanks so much for your help!