Brad created a small plugin on the fly as a temporary fix to solve an upgrade issue which I’ve documented here for your pleasure… =)
This plugin will disable/stop/cancel all upgrades to a Movable Type installation.
Because some plugins require upgrade scripts, the DoNotUpgrade plugin must be removed/disabled/etc in order to perform upgrades to MT.
Create a file:
MT_DIR/plugins/DoNotUpgrade/config.yaml
Add the following code to the file:
callbacks: init_request: sub { MT->app->{upgrade_required} = 0 }
This plugin should work in 4.x versions of Movable Type.