Instruction card popup location: Selects the window where the instruction card popup will appear when you use the "Instructions" command in the main menu. If the window you select is closed when you try to bring up an instruction card, the popup will appear in the main playfield window instead.
Note that this doesn't affect the separate Instruction Card window, which is designed to be positioned on a dedicated instruction card monitor on your pin cab apron. If you don't have a dedicated monitor for that, you can just close the Instruction Card window so that it doesn't take up any display space. (To close it, right-click in the window and select Close from its menu.)
Include .swf (Shockwave Flash) files when searching for instruction card images: If this box is checked, PinballY will include Shockwave Flash (.swf) files when searching for instruction card images, along with the normal set of image file types (.png, .jpg, .jpeg). If this box isn't checked, .swf files will be ignored.
PinballY can only display .swf files if you have the Adobe Shockwave Flash Player ActiveX installed on your system. If you don't have Flash installed, you'll get an error message every time PinballY tries to load an .swf file, to let you know that you need to install Flash Player to use those files. The error message is intended to be helpful, to let you know what you need to do to view those files successfully, but it's just an annoyance if you deliberately avoid Flash. This option is provided so that you can get rid of those error messages if you never plan to install Flash. If you un-check this box, PinballY will silently ignore .swf files when looking for instruction card images. It'll still look for conventional image files (PNG and JPEG).
See Flash Player for more details, including instructions on how to install the correct version of the Flash plug-in.