OK, what you are seeing is "may be dangerous" warning that windows 10 displays if MS servers does not cache a lot of downloads of the file. Most likely this will never disappear because well, to be honest you wont have thousands of downloads of RS Mapper, the "market" is too small. Also, the zip file contains an unsigned .exe file - I would have to pay for certificate to sign it and since this is non-profit app- well, I will most likely not do that. Having said that - I had this warning myself on my PCs :)