Security Error : Unknown Error ( H0078 ) when logging into Hatch
If you get the Unknown Error (H0078) while trying to login to Hatch Embroidery v3 or v4.

Follow the solution below.
Solution:
Tell Windows to Show hidden items:
For Hatch 3:
In your Windows Explorer, open this path: C:\ProgramData\SafeNet Sentinel\Sentinel LDK\installed\30918
For Hatch 4:
In your Windows Explorer, open this path: C:\ProgramData\SafeNet Sentinel\Sentinel LDK\installed\23325
Continue by deleting xxxxxxxxxx_base.v2c and xxxxxxxxxxx_update1.v2c
Then, launch the Hatch Embroidery.
Hatch should work as expected.
Note: If you cannot locate the folder C:\ProgramData\Wilcom, it may be hidden, please see here to reveal the folder