GM 0.5.3
News: Many users are having problems upgrading from 0.3.x to 0.5.x. If it seems like "nothing works" after upgrading, or if all your scripts are gone, follow these directions to fix the problem.
何のためのベータ版だったのかという気がしなくもないけれど、0.5.3 は正しく動作するようだ。一安心。