Click on Ultimate Family Tree Software on the right side of the page, click on Tech Support and FAQs click on Knowledge Base fill out the form with your version of UFTree, then enter your problem.
This is an automatic answering place. You do not write in complete sentences here. Just enter a word or two that might be related to your current problem. In this case, I only entered Error 41.
Try that. See what you get.
If you can't find what you need there or need more help in how to do something that is not there or something that is there but is unclear to you, then try this message board again.
Do you know how to 'copy and paste'? When you get strange and difficult to understand messages from the UFTree program, try to copy them by highlighting the message, going to Edit (in the bar across the top of your screen), press copy, leave there, go to any word processing program you have, even WordPad, press Edit, press paste, then print it out. This can give you time to cool down and read the message again later when you are not in such a panic. It is also useful to be exact about what the computer message said when you ask for help.
Once upon a time I didn't know any more than you do about computers and any mention of DOS was scary. And there are lots of people who know a lot more about computers and programs than I now know. It is also surprising how often a little time will solve a problem. So, rule #1 is, write it down and don't panic.