All of my Glyphs Mini letters are locked

I’m new to Glyphs Mini, and I have been exploring the app so that I can use it in my classroom this semester. With only three letters to go on the lower case, all of my completed drawings have become locked, and I am unable to select points or paths; I’m also unable to draw within new glyph windows. I can’t figure out how to get around this. Any advice?

Can you post a screenshot of the font view and an edit view?

Could you still send me the locked file? I might be able to improve the issue.