I found a workaround: I made a 'fake plugin' by copying the win8 plugin folder in the plugin folder (C:\Program Files\Construct 2\exporters\html5\plugins) and renamed it to "Xbox Live" as the plugin name and "XboxLive" as the ID in the edittime file (you can download the edit I made here https://www.dropbox.com/s/si4qsmmh9tzpz ... 20Live.zip ), which allowed me to open my project, so that I could remove the problem plugin, and save the fixed project.