This happens when the program lacks directory permissions. Ensure you extracted the tool completely out of its ZIP folder and ran it as an Administrator.
The Adjustment Program is official Epson service software intended for authorized technicians. It allows for deep-level maintenance of the printer that the standard driver software cannot perform. Key functions of the T50 Resetter include:
Your printer should now work again.
Resetting the digital counter solves the software lock, but it does not magically clean the physical ink pads.