Suddenly my Manager program is missing?

I used Manager yesterday and today the icon is missing from my task bar and the program can no longer be found, is this a known issue? Is there a fix for this, I don’t understand, it is as though it has been uninstalled completely.

Have you tried installing it again?

I’ve just done that now and the data was there, I was worried it may overwrite something but this seems ok. Issue resolved. (though I’m still not sure how the program was lost)