Notes about the 404 file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The 404 file type is primarily associated with 'FruityLoops Channel State File'. Replaced by .FST in ver 2.5.0
Detailed information for file extension 404:
Important: Invalid file associations could be the result of underlying issues within your Windows PC. It is highly recommended that you scan your PC for invalid registry entries, unused processes and other slowdown issues.
To view technical data on file-extension 404 click this link
to expand/hide the additional area.
System Info for File Extension .404
The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly
from user systems.
EXEFile: %ProgramFiles%\ptc\proeWildfire 3.0\bin\proe.exe