If you're talking about save compatibility, if your saves are from 0.122a and onward (has the persistent.rpgmaker file), then it should still work with 0.204, and the save guide will still apply.
If your version is from before 0.122a, it could still work but you will lose your gallery progress as the switches in game are different to the ones in those saves.
Hope this answers your question, but be sure to let me know otherwise.
- RegalBuster