Please read everything before following instructions.
Launch the game
When you launch the game, given internet connection, the game will send a web request to one of my pastebin posts and check the text in the pastebin post against a number stored in the game, if this number is less than what was taken from pastebin you get an update screen which probably took you here.
Click Update
Once you click update, the settings, just as a precaution, get saved to a file in a folder called Save in the folder where this game is installed to. After that you will be taken here and instructed further, just make sure to copy that save file somewhere.
Get the latest version of the game
Click download on this site and find the newest version for your platform, after that install the game, you could just install it over the old one. After all is done launch the game.
Lost your save data in game?
This is what the save file is for. If for whatever reason the PlayerPrefs got cleared and your progress is gone, go find that save file you hopefully copied to a safe spot and put it with the games files in the Save folder. After that, go to options in game and hold control and press s. You will be met with a screen asking if you are sure you want to overwrite your data with the file, click yes and it will bring it all back so long as it did not get corrupted or have a name change.