Spark the Electric Jester 2 has just received an update, v1.5.

There isn't much to this version as it merely brings some performance optimizations made originally for the console version.

A couple things to note:

• Your save file may not be carried over.
  
• However, in the game's proprieties, you can revert to the previous version (1.3) and I believe it should keep your save data.
  
• And yes, you can revert back to the previous version by right clicking the game, selecting proprieties and going to "BETAS".