Because v244120 mandates modern TLS, older systems may fail.

Registry fix (run as admin):

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319]
"SchUseStrongCrypto"=dword:00000001

Then reboot. This forces .NET applications to use TLS 1.2.

Before jumping to fixes, it helps to understand why v244120 can be problematic:


Instead of the Excel add-in, use dbForge Studio (for databases) or Devart Data Pump Console to export data to CSV, then import into Excel. This bypasses the add-in entirely.

Devart Excel Addins V244120 Fix Best ❲SIMPLE • 2026❳

Because v244120 mandates modern TLS, older systems may fail.

Registry fix (run as admin):

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319]
"SchUseStrongCrypto"=dword:00000001

Then reboot. This forces .NET applications to use TLS 1.2. devart excel addins v244120 fix best

Before jumping to fixes, it helps to understand why v244120 can be problematic: Because v244120 mandates modern TLS, older systems may fail


Instead of the Excel add-in, use dbForge Studio (for databases) or Devart Data Pump Console to export data to CSV, then import into Excel. This bypasses the add-in entirely. Then reboot