Trying to run Wircher 3 from already donwloaded GOG Galaxy

I want to try to run The Witcher 3: Wild Hunt without having to download it again. I downloaded it on Windows with the GOG Galaxy app. Now I’m trying to imitate the GOG installer and use the local files from that version.

What I don’t get is this last part, I don’t know what “Desktop: true” means. I guess is diable desktop effects.

wine: Desktop: true dxvk: true

files:
- setup: N/A:Select the game's setup file
game:
  arch: win64
  exe: drive_c/GOG Games/The Witcher 3 Wild Hunt/bin/x64/witcher3.exe
  prefix: $GAMEDIR
installer:
- task:
    arch: win64
    name: create_prefix
    prefix: $GAMEDIR
- task:
    args: /SP- /SUPPRESSMSGBOXES /NOCANCEL
    description: Installing Witcher 3
    executable: setup
    name: wineexec
    prefix: $GAMEDIR
system:
  env:
    __GL_SHADER_DISK_CACHE: 1
    __GL_SHADER_DISK_CACHE_PATH: $GAMEDIR
  pulse_latency: false
wine:
  Desktop: true
  dxvk: true

wine: Desktop: true means wine is to use the virtual desktop

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TY for the help