No you have not.
You need to download manger from the only official site https://www.manager.io/download/ where the current version is 21.4.55
If you are updating from a very old version of Manager you may need to follow these instructions Restoring data issue - #2 by Patch
By the way please change your thread title to a heading for your problem not how you feel other users should respond. It increases the chance you will receive useful support.