As mentioned above you can also download E-Aadhaar through your Enrollment ID as well. In case if you have lost your Enrollment receipt as well then the only option is to update Mobile number with UIDAI and download after the mobile number is updated.
Alternatively you can visit any Aadhaar enrollment center near your place and get the E-Aadhaar file by giving your biometric authentication and also update your Aadhaar with your current mobile number.
You can get more details on how to update your Aadhaar details and mobile number from the link below. This method is useful only if your mobile is already linked to Aadhaar.