1. Unfortunately, you MUST start a new game. Your old save file is not compatible with this release, due to the sheer amount of changes.
2. Please, please save often! I can't stress this enough. The game is still in Alpha and there will be bugs... The auto-save feature is still quite unreliable and I haven't been able to replace it yet, so do not use Slot #1 to manually save your progress. We are working on a new custom auto-save feature that actually works all the time.
3. If you don't know how to proceed, you should read the Quest Journal. It usually has some tips. Even the description of an item can help you complete a quest. If you're still stuck, you can check out our Wiki page which includes a partial walkthrough (with spoilers!), thanks to "BleachedAssholes".
4. The nightclub mechanic has been implemented as a main mission, which means it's essential to progress the game. It still needs some work, and I look forward to your feedback about it. It also has a few "hidden scenes", which I am sure you will figure out how to unlock.