1. Rename the orignal "Interface.dll" to "Interface.dl1".
2. Copy "Interface.dll" to the install directory.
3. Login is disabled.

#VirusTotal
Interface.dll                                                         www.virustotal.com/#/file/ef409eaa2e6759df7c2f64e0722539b155e7f484c0588242f510a485ec6cfd32
Simplify3D-4.0.1-windows-installer.exe          www.virustotal.com/#/file/b0fe24c5e2e67ff708f930f569e2fe0325135782824172e340e3aed819f9eadf