program won't start anymore

[void]

Some ideas:

Is a Everything.exe process created when you run Everything.exe?

• Press Ctrl + Shift + ESC to open the Task Manager.
• Click the Details tab.
• Is Everything.exe listed? Please note there should be two processes. One for the search client and one for the Everything Service (if you have the service installed)
• Click the Services tab.
• Is Everything listed? Is its status set to Running?

Something wrong with the code signing certificate? certificate store? -Could you please check the Digital Signature on your Everything.exe:

• Right click your Everything.exe and click Properties.
• Click the Digital Signatures tab.
• voidtools should be shown in the signature list.
• Select voidtools and click Details.
• Please make sure the digital signature is listed as OK:
  

Disable ASLR:

• From the Start menu, type in: security
• Click Windows Security
• Click App & Browser control on the left
• Click Exploit Protection Settings
  
• Set Force randomization for images (Mandatory ASLR) to Use default (Off)
  
• Restart your PC.

Add an exception for Everything.exe to your anti-virus.

Does running Everything as an administrator help?

Please try starting Everything in debug mode:

• From a command prompt, navigate to your Everything location, eg:
  cd \program files\Everything
• Launch Everything with the -debug command line option:
  Everything.exe -debug
• Is anything shown in the command prompt?