how do i delete mega backup when it says its "in use" but its not?
I'm assuming you're referring to a normal backup, not Time Machine backup. Restarting your computer should "free" it from the app that was last using/creating it.
i have tried that many times and it still tells me its open when i try to move it to trash
On what Mac, with what operating system?
The application is set to automatically launch at startup, which is why you can't remove it.
Here are things to try:
Go to System Preferences -> Users & Groups -> <your account> -> Login Items
If Mega Backup is listed there, uncheck it, then reboot. Now it shouldn't be running and you can delete it.
if it's not in Login Items, use /Applications/Utilities/Activity Monitor and look for the process listed there. Double-click it in the list, then click the 'Quit' button. Now you should be able to delete it.
If neither of these two work, post back and we can dig a little deeper.
how do i delete mega backup when it says its "in use" but its not
