Modifying or Repairing an Installation
Suppose you suspect a .DLL file is missing or is corrupted and you want to fix it, or you need to otherwise change your Studio installation.
These kinds of situations can be addressed by either modifying or repairing the installation, which you should do by re-running the installation .exe file. Do not use Control Panel Add-Remove Programs to do this; it will request an .msi file, which is not retained after the original installation.