There is a false virus that is being detected so your download/installation may not be completed or blocked.
Solution: Turn off antivirus. It must remain off until all process are done. Add the Launcher.exe and BandMaster.bin in the exclusions/exceptions in your antivirus.
If you have Avira AntiVirus, follow this:
Open your Avira go to Extras > Configuration Add "Launcher.exe" and "BandMaster.bin" in the Real-Time Protection Exceptions (I also added mine in the System Scanner Exceptions) Click the ... to browse the Launcher.exe and BandMaster.bin then "Add" Click Apply then Ok.
If you have Avast AntiVirus, follow this:
Go to the File System Shield and open Expert Settings. Go to Exclusions and browse the "Launcher.exe" and "BandMaster.bin" file in your BandMaster folder. Check all 3 boxes, Add then Ok.