If you have problems with crashing or other problems while starting Blockade 3D, try this:
1. Make sure that the game is currently not running
2. Go to Unity Player's caches web page[unity3d.com]
3. Find "NLDT_BLOCKADE3D" and click on it
4. Press button "Delete NLDT_BLOCKADE3D..."
5. Restart Blockade 3D, it should start to download game content (0/26)

Reloading game's cache may help in common situations.
Important. By pressing delete game's cache, you only deleting game's cache itself, so you will not lose any purchases.