D5 login every day

Hi, I seem to have to login every time I use D5 now, is this a bug and any fix to remember the session?

Hi @jonathanwall82

  • May I know which D5 Render Version you’re currently using?

  • Are there any other person using your D5 Account in a different device?

  • How about your ISP, did you connect to another ISP? This will usually prompt you to log-in again.

There are several possible causes:

  1. Mismatch or corruption in the CID (Client ID) between %localappdata%\d5_launcher\cid.dat and the Windows Registry (HKEY_CURRENT_USER\Software\D5 Render\Render or \usa).

Suggested Solution:

  • Navigate to %localappdata%\d5_launcher\ and open cid.dat. Note the value.
  • Open Registry Editor and go to:
    • HKEY_CURRENT_USER\Software\D5 Render\Render (or \usa)
    • Compare the cid value there with the one in cid.dat.
  • If they differ or the file is corrupted, delete cid.dat and restart D5 Launcher.


  1. Network-related issues (e.g., proxy, DNS, enterprise security software interfering with certificate validation).
  • Disable any proxy/VPN (e.g., Fiddler). Some users could log in only when Fiddler was enabled, suggesting TLS/SSL interception issues.
  • Ensure system time is correct.
  • Check for enterprise security software that might interfere with certificate chains.

  1. Last Resort is to reinstall D5 Launcher and D5 completely.