First, this shouldn’t have been rolled out in the first place. Second, I shouldn’t have to read through seven pages of forums to find possible fixes.
That said, thank you georgealon for providing a sanctioned download for v1.4.1, since most normal users will need it to fix this problem. (shouldn’t be buried on page 6)
After encountering this error and reading all these pages, I ran the v1.4.1 installer. I closed the dashboard and uninstalled using the ‘Programs and Features’ uninstall. This didn’t work for me and I never found an .msi file. I re-ran the v1.4.1 installer and it was automatically in Uninstall mode. I completed that and checked the C:\Program Files (x86)\SanDisk\SSD Dashboard folder. The only thing left was a folder named “smart”. I was then able to successfully install the v1.4.2 dashboard.
(v1.4.1) SanDiskSSDDashboardSetup.exe md5: 860149c66ee850faaa4edd96f2cf53d3
(v1.4.2) SanDiskSSDDashboardSetup.exe md5: e4adaa96bfa36165007fa4d1dc0f27d1
Until support assembles an installer capable of properly uninstalling v1.4.1 and fixing this mess, this forum needs to sticky the workaround (mine or someone else’s) or say you’re working on the problem.
tl;dr If you get this error, download the old version 1.4.1 dashboard installer.[link] Run it, then close the dashboard. Right click the dashboard icon in the lower right systray and exit. Run the v1.4.1 installer again. It will say “Uninstall”. Then run the new v1.4.2 installer.[link] Done.