psferg wrote:
no error messages
That's a bit strange. Have you tried from a console?
To find out about dependent DLLs you can use
Dependency Walker (for x64). Anything missing or strange paths there? MSVCR100.dll and MFC100.dll should come form c:\windows\system32.
Sysinternals's Process Monitor may be able to tell you how far you get when launching TransDEM. Set the filter to "process name" "is" "TranzDEM64.exe".
About a clean installation:
Apart from the installation directories (different ones for 64 and 32 bit!), TransDEM leaves footprints in the registry and in user app data.
Registry:
HKEY_CURRENT_USER\Software\Rolandsoft\TransDEM
HKEY_CURRENT_USER\Software\Rolandsoft\TranzDEM
HKEY_CURRENT_USER\Software\Rolandsoft\TranzDEM64
Be careful when deleting those entries: You will also delete registration key hashes and will have to re-enter the key. You will also lose personal settings.
(There will be many more TransDEM traces in the registry but none that should affect start-up.)
app data:
<user>\AppData\Local\TransDEM
Most of these files will be read when TransDEM starts.
The KUID cash will be reset when files are deleted here.