I’m frustrated

2.0.7 strike setup issues

While running the installer (Win) , this message comes:
"Checksum error in AIR Music
Technology\AIR Content\Strike\Strike data3.big
Unexpected end of archive"
I am a bit lost, so i'm just trying to download those 3 parts (which is annoying considering how bad my internet is ) and try it again.

Is there another way to fix this ?

Thank you
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