Just loaded 1.90 back and it actually has the issue too...assuming installing 1.90 back on top of it updated all files (It said 1.90 in about and 1.91 for beta). I guess I never noticed it since my layouts were called main and similar number of chars.
I did notice one other thing too. The ... meaning I noted above is only used once in all parts of B4A. There is a Save As in the Designer window with them. Save As is missing from the IDE, and the ... is missing from all the menus that open a dialog like Open, Export as Zip, Page Setup, Print Preview, Print, Find, Add Existing Module, Choose Icon, Package Name, App Label, App Version, Manifest Editor, Configure Paths, Private Sign Key, etc. Same thing in Designer- Generate Members, Change Grid. The ... helps users know what will happen when the menu is clicked like if it just performs an action, if it is a checkbox item, or if it opens a dialog to do something else.