The auto update feature that I crafted myself using a PHP script as a backend has been replaced by the popular Sparkle framework which is so prominent in OS X apps these days Apple might as well buy it or include something similar as a public system framework. Needless to say the updating will be more efficient now and reliable which is good for us all.
There were some minor bug fixes also with the activation key field in the preferences and broken multiple displays window in the French and Japanese localizations.
Version 1.4.4 is the last version that will be using the old auto update so once you get that version TaskCard will update itself using the new system.