Cursor defaulting to right hand side even though set to left hand

My program has been working perfectly then the cursor defaulted to the right hand side of the screen even though set in LH mode. I am unable to backspace to move paragraphs as a result. I’m sure there is an easy fix. Hopefully someone can help me.

The menu Format / Text /Writing direction is not set right to left?

Thanks Argoed -I had clicked the LH text format on the tool bar however when I went into the actual menu settings I managed to fix it by choosing LH side there. Must have been a gremlin!