Thank you. I have worked alone for 18 years though it wasn't my desire. It is often hard to find collaborators. I agree as you say, passing it on to someone on the fly would problably be more work.
People have thanked me for the software when I have sought no feedback. It obviously have value. I think I will have one more go at getting it up to date and more secure. I have the term micro changes in my head as a way forward.
As a young man I created a beast of a thing and now in my 50s I need to tweak and not rewrite :-)