I made some changes directly to the unit1.lfm file on disk.
Unless you exactly know what you are doing, do not edit the lfm file yourself. From you screenshot, I guess that you added a menu item in the lfm file, but forgot to add the new TMenuItem variable to the pas file. You have the menu editor to add/delete menu items.
Yes, I added a couple of menu items. I found the object inspector routine of click your Menuitem, scroll to where the name property is then type it in, then repeat as necessary a rather tedious process after a while. So decided to directly enter stuff into the unit1.lfm. But that was a mistake, hard lesson learnt :-)
No fix or workaround I suppose? Attached screenshot shows there is NO designer-Form1 (So where did it go?)