I have Win 10 and Digitakt. I cannot install the update or remove the previous version of Overbridge 1.37. I ran into this before and probably just left it broken in my system and never used the plugin. Elektron should provide a manual uninstall guide for both Windows and OSX. The 1.37 repair is looking for an installer in a temp folder that does not exist. This is probably some issue with the Windows cleanup and not the installer. If your installer requires the files, please update the installer to place them in the system where they will not be removed. This seems an issue with the temp locations or the file type.
Elektron, please offer some advise. If this is an issue where you do not want to be liable for users editing registries then build a cleaner tool like Adobe did or recommend software that can complete this task.