[@Felix Crevat]
Hi! Please try using one of these alternative installers:
Windows: https://aurorahdr2018.s3-accelerate.amazonaws.com/Aurora__Setup_SIC.msi
MacOS: https://downloads.skylum.com/aurorahdr2018/mac/1.2.0/Aurora_HDR_2018.dmg
Reply To: Aurora HDR / Jun 2 2020