I have Windows 7 Japanese version.
Both data structures extension (used for 2D Lists) and rpg dialog errored- I wasn't using them- I uninstalled them and I still have the code blocks!!
Weird. Is this something to do with latest omnibus of Windows 7 updates? I have had other odd things happen on this computer like Adobe Creative Cloud signin window open- normal for that to open but it was in Japanese unlike normal where it was in English.