I am very sad to hear that!
Thank you for developing it in the first place!
I still use Script Debugger almost every day to enhance the AppleScript abilities of my own #NeoFinder software, epsecially the Explorer is absolutely amazing and helpful for that!
Back in 1995, I helped develop a large newspaper software using FileMaker and QuarkXPress, and AppleScript to bring them together and automate data transfer, even to other Macs in the network. Without Script Debugger, such a software would have never been possible at all.