I'm sure there's a problem with Windows here (Windows 10 Pro 1703 Build 15063.413) but according to the Apps list under Settings, 'GPSoftware Directory Opus' is occupying 26.3GB of valuable SSD space.
The GPSoftware folder in Program Files is only 96MB, the folder in AppData/Roaming is only 15.9MB and the AppData/Local folder is 23.1MB. C:\ProgramData is only 421KB.
I haven't attempting an uninstall/reinstall to see if it's any different but it doesn't seem right.