This is to be performed only when you are unable to uninstall from the Windows Control Panel. DISCLAIMER: Editing the Windows Registry can be dangerous. If the wrong registry key is deleted it can cause Windows to stop functioning in a variety of ways. Be careful and don't delete or edit anything unless you are absolutely sure what it is.
Delete the "Program Files\IronCAD" folder.
Clear IronCAD from the registry. Go to Start, Run, enter "regedit" and click OK.
The first places to start are:
HKEY_LOCAL_MACHINE\SOFTWARE\IronCAD
HKEY_CURRENT_USER\SOFTWARE\IronCAD
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ (Search for the word IronCAD and delete the key that you find it under. The key should be a guid that looks something like {02B83608-77B4-4DA1-A09E-4BA737E0E1A4}) The guid for IronCAD 2019 is {C2C48BFB-0BCD-4B3E-B049-2B2508612D1A}
Aside from those there are many places in the registry with dynamic key names that are too numerous to list here . If you search for IronCAD and just delete all of the keys that you find that are specifically labeled “IronCAD” then you've pretty much done everything you can do.