@echo off assoc .class=BCV assoc .apk=BCV assoc .dex=BCV ftype BCV="%CD%\BytecodeViewer.exe" "%%1" echo. echo. echo Installed, .class, .apk and .dex will be associated with BytecodeViwer.exe echo. echo Note, if you move BytecodeViewer.exe echo you'll need to re-run this program in the same directory as it. echo. echo. pause