Donwgrade because of bug

Since 1.2.3 Scapple refuses to create new notes with the style of the selected note (even though I have thi s behavior checked under general options). Having to style every note after its creation slows me down considerably.

What is the safest way to downgrade back to version 1? I am on Win7 and unfortunately I already have activated 1.2.3 with the new Paddle service. How do I go back to version 1?