While inadvisable, the relevant registry key for the Windows OpenEdge version in use can be deleted:
HKEY_CURRENT_USER\SOFTWARE\PSC\PROGRESS\<ver>\Startup\DLC
Not finding the HKCU entry, the HKLM Registry entry will be used instead:
HKEY_LOCAL_MACHINE\SOFTWARE\PSC\PROGRESS\<ver>\Startup
Deleting the registry keys can be run from an elevated command line:
regedit.exe /s deleteDLCfromHCU.reg
With the content of the file
deleteDLCfromHCU.reg as follows:
Windows Registry Editor Version 5.00
REG EXPORT HKCU\Software\PSC\PROGRESS %TEMP%\HKUPRGS.REG
[-HKEY_CURRENT_USER\SOFTWARE\PSC\PROGRESS\11.5\Startup\DLC]
[-HKEY_CURRENT_USER\SOFTWARE\PSC\PROGRESS\11.6\Startup\DLC]
[-HKEY_CURRENT_USER\SOFTWARE\PSC\PROGRESS\11.7\Startup\DLC]