I accidentally clicked the "Ignore This Update" button on the update dialog (attached) and now when I check for updates IDEA tells me that I am up to date.
How can I reset the effect of clicking this button?
This issue has already been fixed; in a future build, "check for updates" will always disregard the ignored updates. In the current build, you need to edit the settings manually (under <UpdatesConfigurable> in other.xml).