Hello,
first thanks for the mod. It is great to request different settings for whatex´ver you need.

I found a bug, if you have saved a request setting and a mod changed its internal name of the maschine or item.
It happens if you updated another mod and then clicked the button to open the GUI.
For example my game crashed after i updated Advanced Furnaces (https://mods.factorio.com/mod/Load-Furn) and the internal name of the furnaces changed from if-furnance-01 to furnance-pro-01.
It would be grait, if you could remove items, that are no more present. I gess it crashes also, if any item is removed.

Thanks in advance

Sorry for the slow response, was away from the game for a while. This issue should be fixed in the 0.18 release.

I didn‘t got to test it, but thanks for the fix.
I‘ve got around with being careful so far...