You can also try this from the MS Technetium site:
Open Registry Editor(WIN + R, type regedit, hit Enter)
Browse to key HKEY_Local Machine > Software > Microsoft > Windows NT > CurrentVersion
Change EditionID to Professional (double click EditionID, change value, click OK). In your case it should at the moment show Enterprise
Change ProductName to Windows 10 Professional. In your case it should at the moment show Windows 10 Professional
Browse to key HKEY_Local Machine > Software > Wow6432Node > Microsoft > Windows NT > CurrentVersion, change the same two values as in steps 3 and 4 above
Close the Registry Editor
Open System>Change Product Key > Enter Windows 10 Pro Key > Click "Activate".
The application will gather the registry info and treat it as a Professional version already.