Often, like 90 of the time, the designer will start in top left corner of the center screen in a minimized state (sized to minimum). Not sure what triggers it.

In C:\Users<your user>\AppData\Roaming\LLBLGen Pro there's a file, guistate50.xml

Delete it.

Start the designer. it will not be maximized, but start on the monitor that's active. Maximize it, move it to another monitor. Close it. Restart designer, it should open on the monitor you closed it last, in the state it had last.

Indeed, WindowSizeState.Height was stuck at -17 for some reason and after I closed the designer in non-maximized state it'd start minimum sized.

mihies wrote:

Indeed, WindowSizeState.Height was stuck at -17 for some reason and after I closed the designer in non-maximized state it'd start minimum sized.

This is still the case? You use the latest v5 build?

Yes, it still happens - looks randomly. Using 5.0.6. Will try to figure out what triggers it (using 3 monitors, 150% size and displayfusion app)

I think I see what could trigger it: if I have it minimized and then close the window with the right mouse button (or I close windows, which will kill the process) I get this state you describe.

This is a bug: a minimized designer shouldn't preserve its state as minimized. (which is what happens when you open it again: it opens minimized. )

Yep, that's most probably the cause.

Fixed in new 5.0.7 hotfix build which is now available (the tiny window in the top left corner is just 0 sized btw, you can drag it open, and with the next build it will stay normal sized and won't be tricked into saving 0 sized windows again when minimized (or maximized)