[Q] [EasyUnlockTool] The System cannot find the file PD981000_Ace_Gingerbread_S_Hboot

So I looked up the method to unlock bootloader of my HTC Inspire 4G. The method I found promising was HTC EasyUnlockTool by glevitan. When I followed the instructions I got a pop-up stating that some kind of file is missing "The System cannot find the file PD9810000_Ace_Gingerbread_Hboot_0.85.0024.exe"
Here's a snapshot attached.


I don't know what's this supposed to mean. Failed to find the solution.