I run the game for a second time and suddenly there is no sound in it! No music, nothing :(
I reinstalled, but it didn't help. Even worse, something happened with UI, instead of three stars next to each level name, I see only two...
Initially all was working cool and alright, but now I have no idea what is happening. Anyone can help?

It's being run on Windows 7 x64 Ultimate on a desktop PC. I can give more info if needed. Any help appreciated!

Well, i've fixed it myself. If anyone experiences the same, try removing Windows register entry regarding Dyad in Audio directory (using regedit and Find feature) and then reinstall the game.