A minor patch is coming. However, updating the game may or may not erase all previous save files due to the limitations of RPG Maker MV. To be honest, since it's just a patch it's very unlikely that'll happen. But if they do and you want to keep your saves then it is recommended to have a back-up of them and then import them into the new version of the game via going into the game files. Otherwise, that's all.

Where the save files are:

• TSSaF v1.0\www\save

If there is no file called "save" in the updated version then either create one or go into the game and create a save.