Flashing old firmware to Spider board - need 4.2.0.0

Hi all,

For reasons beyond my control, we are using an old version of Gadgeteer that I think is 4.2.0.0 (When looking at the program output) but the board I have says it has 4.2.11.1 and so I get the error:

Is there any way to get the 4.2.0.0 firmware from anywhere so I can re-flash the board? I can’t find an older version than 4.2.11.1.