StepSelect UPDF across the list and check the option Always use this Can't open PDF on your computer. If you cannot open a PDF, follow the troubleshooting steps below in the order they appear Error message: Adobe Acrobat Reader DC could not open because it is either not a supported file type or because the file has been damaged (for example it was sent as an email attachment and was not oded) Could not open 'B_Booster PS (Working Copy).pdf' because it is either not a supported file type or the f