Dont use Characters in File Version
You cant use “prototype_v1.0” make sure the File Version is something like 0.9.1.0
You can read about proper versioning here Software-versioning - Wikipedia
Since you are still developing your game you should use the 0 mantissa.
Versions above beta will use 1 mantissa and versions on release will use 2 mantissa or greater.
Definition from Computer Science - Mantissa refers to the beginning digit of a number.
ex, The mantissa of “322” is “3”. More accurately the mantissa of an 8-bit octet signed is 1 for negative floats and 0 for positive floats.