If you install an official update (rare now), it will overwrite your modified stadium.cpk . You will need to re-apply the crowd disabler.
The primary reason is performance. By disabling the crowd, the game reduces CPU and GPU load. This results in a smoother frame rate, eliminates lag spikes during cutscenes and corner kicks, and makes the game "much smoother". pes 15 crowd disabler
A: No. This mod only affects visual graphics (textures and 3D models). It does not touch your Master League or Become a Legend save data. If you install an official update (rare now),
Extract the contents of the zip file to a temporary folder. The folder will contain Jenkey's File Explorer and the required root data files. By disabling the crowd, the game reduces CPU and GPU load
Download the "PES 2015 Crowd Disabler Tool by _anderson" (typically found in .zip format).