Engine asserts on blueprint open - won't allow editing

I was attempting to figure out why my word wrapping wasn’t working on my multi line editable text block. It would wrap after about 150% of the width of the box. If I set the “wrap text at” number to anything other than 0, it would not wrap at all. This was contrary to the hint text, so I tried -1.

Now when I open the blueprint, I get an assert and the editor breaks. I cannot open the blueprint to fix the offending property.

This blueprint represents at least 3 full days of work. Is it corrupted? Is there any way to retrieve my work?