I tried below troubleshooting because EH services may not be running correctly and it seems to cause fails to start EDIUS:

Troubleshoot to be running of background render service
Error starting EDIUS, Failed to communicate with the service

but EDIUS still fails to start. 
In this case, follow below steps:

Preparation

1) Press Win + R key.

2) Type certlm.msc then click [OK].

3) MMC will run. In the left-pane, select Personal > Certificates

4) In the right-pane, select local host (ensure that its friendly name is ‘EHRender service development certificate’) then right-click and select [Delete]

Uninstall EDIUS

Uninstall EDIUS without license deactivation – details here

Reset EDIUS Hub

Reset EDIUS Hub – details here (Only EDIUS X)

Reinstall EDIUS

Once you complete all of above, run the EDIUS installer.

Related Content

• Troubleshoot to be running of background render service
• Error starting EDIUS, Failed to communicate with the service
• Step to uninstall EDIUS
• Reset EDIUS Hub