If the screen resolution is 1024x768 (or any other width but a height of 768)
and if the default Gtk theme named Adwaita is in use you may encounter a crash
when opening the options window (Tools menu | Options). It is likely this is
in relation with wxwidgets-3.0 + gtk3 + some specific theme installed. It
seems related to computation of the sizes for display on screen. Maybe this
happens in other conditions or screen resolutions depending on your theme and
layout.

This problem doesn't exist with :
- another GTK Theme (another than Adwaita). It works with Numix, Yuyo,
Greybird...
  The command would be (provided you have installed the package for it:
  numix-gtk-theme).
    GTK_THEME=Numix FreeFileSync
- upstream's binary which is built with wxwidgets-3.2 + gtk2.
- the debian package when it is built with wxwidgets-3.2 + gtk3 (it is the
case
since bookworm).

The last line called in FreeFileSync before the crash (which happens in a
function of glib2 and/or gtk3) is this one:

https://github.com/hkneptune/FreeFileSync/blob/v13.3/FreeFileSync/Source/ui/
small_dlgs.cpp#L1522

    `m_gridCustomCommand->SetColSize(0, w0);`

backtrace attached (made on jammy)