It seems Conon does not have any firmware for the ir2318.
If you have any problem with any electronic device, DON'T try to solve this with a software update.
All updates have the same restrictions.
The system must have enough power to load and install the update (power cord is the best) and all systems should be working without any flaw. As soon as something is wrong, you can't be sure the update is loaded correct in the memory and installed.
Most factories, only release updates when they discover lots of bugs in the software. Providing the firmware comes with more warnings then I already gave.
If you want to try with canon? be my guest here is the link for support. Just fill in the model number.
http://www.usa.canon.com/cusa/page.action
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