For those of you with the "d3dx9_42.dll is missing from computer" error please try the following....
1. For Windows 7/Windows 7 SP1 and older versions (Standalone installer). Link: https://www.microsoft.com/en-us/download/details.aspx?id=17718
2. For Windows 8 and 8.1 and older versions (Windows 7 does not seem to be supported). Link: https://www.microsoft.com/en-us/download/details.aspx?id=42642
3. For Windows 10 and older (Windows 7 does not seem to be supported). Link: https://www.microsoft.com/en-us/download/details.aspx?id=49981
^^ The above are packages that provide the .Net Framework Runtime and other associated files (Direct from Microsoft)
required to run/develop applications that target the .Net Framework 4. This means you could be missing an important .Net Framework that the aforementioned packages provide which may help to run TLOPO.
If nothing else try installing DirectX Runtime as mentioned above by previous posters. Link: https://www.microsoft.com/en-us/download/details.aspx?id=8109
1. For Windows 7/Windows 7 SP1 and older versions (Standalone installer). Link: https://www.microsoft.com/en-us/download/details.aspx?id=17718
2. For Windows 8 and 8.1 and older versions (Windows 7 does not seem to be supported). Link: https://www.microsoft.com/en-us/download/details.aspx?id=42642
3. For Windows 10 and older (Windows 7 does not seem to be supported). Link: https://www.microsoft.com/en-us/download/details.aspx?id=49981
^^ The above are packages that provide the .Net Framework Runtime and other associated files (Direct from Microsoft)
required to run/develop applications that target the .Net Framework 4. This means you could be missing an important .Net Framework that the aforementioned packages provide which may help to run TLOPO.
If nothing else try installing DirectX Runtime as mentioned above by previous posters. Link: https://www.microsoft.com/en-us/download/details.aspx?id=8109