Your hotkeys directory will have a definition file, in my case (using hotkeys2000) it is called myhotkeys.h2d.
I don't remember what extension version 1.51 has for it's definition files but it will be a file without a defined icon next to it.
Simply save it/them somewhere for future installations. I have several different definition files. It is easy to switch between them from the hotkeys file menu (or with a hotkey).
I would hate to have to recreate them with each installation! Nothing I have not been able to do with this program...though the learning curve was tough until I studied the examples.
Have used it for years, I would hate to be without it!