I've created an Admin Image for 2017 SP3, and configured it as a New Installation (after completely uninstalling the previous version). Every installation appears to run fine, without any errors, but in the end the 2017 installation ends up in C:\Program Files\SOLIDWORKS Corp\2016. If I manually uninstall 2016, then run the same Admin Image, it installs to the correct location.
I've re-downloaded the SolidWorks installer and re-created the Admin image 3 times. Same result.