I also downgraded from 1.1.7 to 1.1.6. If you can't find the 1.1.6 firmware, use the filename from the link on the Canon site and change the version number and paste into a search engine.
Install process is exactly the same. If running from sd card the camera will say it is upgrading from 1.1.7 to 1.1.6.
I can't claim this works in every downgrade scenario. Some firmware may potentially not be suitable to roll back.
In my case I had actually upgraded to 1.1.7 before checking the nightly build page to realise I shouldn't upgrade the Canon firmware. So I thought that it would be worth trying the roll-back.
I have magic lantern running okay.
I am watching a storm and hoping to photograph a lightning bolt.
Install process is exactly the same. If running from sd card the camera will say it is upgrading from 1.1.7 to 1.1.6.
I can't claim this works in every downgrade scenario. Some firmware may potentially not be suitable to roll back.
In my case I had actually upgraded to 1.1.7 before checking the nightly build page to realise I shouldn't upgrade the Canon firmware. So I thought that it would be worth trying the roll-back.
I have magic lantern running okay.
I am watching a storm and hoping to photograph a lightning bolt.