Had to uninstall it right away.

Lesser problem: if I had 2 windows docked, say one to left side and one to right side, resizing one using the inside border did *NOT* resize the other accordingly.

Much bigger problem: it was stuck “ON”, meaning if I had EVER touched a window with Power Resizer, typing the alphanumeric half of a hotkey combo ALWAYS affected the window, even after exiting Power Resizer! Example: If I docked a window to the right half of my screen using Power Resizer with Windows Move + S, then later maximized it again, then exited Power Resizer via a right-click on the tray icon, typing just an “S” or “s” into that window all by itself docked the window to the right side of my screen again even though Power Resizer was no longer supposed to be running. Worse, I couldn’t maximize the window anymore. That’s why I uninstalled it.