Well, you have quite a few issues going on here, so we should probably do some troubleshooting.
1. press ~ to see if there are any errors in the console while testing the game.
2. what exactly is not working with the switch scene behavior?
3. for your random collision issues, I've experienced something similar before. I recommend you download game debugger on forge and use it to check the collision bounds in game.
In terms of downgrading to 1.0.2, you need to realize that we are still technically in beta, it is just a public beta rather than private. This means you are likely to experience bugs with the application. If you do, then report them. Unless a section on the site contains archived versions of SW, it is likely you won't find older versions, not now or in the future, or unless someone has a copy available.
Also, there are plenty of programs that make updates without advising its irreversible.
Oh and in regard to the missing strings/blocks, etc. it is because different features exist in different versions of sw. Example would be that 1.0.2 introduced different sound blocks, hence their lack of avilablity in 1.0.0. 1.0.3 introduced a block reduction which means language packs were updated, thus making it so strings were missing in 1.0.0. these changes, of course make it hard to just reverse the version you are using.