Anytune is damaged and can't be opened – Anytune Help Center

The "Anytune damaged and can't be opened" message is provided by the operating system (specifically by Gatekeeper) when the file is suspected of being tampered with.

Ensure you are running the latest version/update of macOS.
Re-download Anytune through the Mac App Store. See Update and Re-install Anytune Mac.

Normally, Apple will not allow you to purchase an app or in-app purchase if you already own it. You can download apps you purchased as many times as you want as long as you use the same AppleID. In this case, you should see download instead of purchase in the store.

Deleting Anytune (Applications/Anytune.app) does not delete Anytune's data including imported songs and config data (settings, marks, notes and lyrics).

In rare occurrences you may need to reboot your Mac, or even Sign Out, Reboot and Sign In to the App Store app before the App Store app realizes Anytune can be downloaded again.

To Logout/Login

Delete Anytune.app
Open App Store
Click > App Store menu > Store > Sign Out
Restart you Mac
Open App Store
Sign in
Re-install Anytune Mac

Collect data and report the issue

Apple engineers would like to identify and fix this problem. However, it is not easily reproducible and they would like more data collected through Sysdiagnose for macOS.

Please note the precise date and time the "Anytune damaged and can't be opened" message appears.
Triggering a sysdiagnose:
- Briefly press the following keys simultaneously to trigger a sysdiagnose from the Finder: Command + Option + Shift+ Control + Period (.)
  OR
- Launch Terminal (/Applications/Utilities/Terminal.app) and execute:
  Enter your administrator password when prompted (for sudo access).

sudo sysdiagnose

Note: The sysdiagnose process can take 10 minutes to complete. Once finished, the folder “/private/var/tmp/“ should appear automatically in the Finder and the sysdiagnose file there will look similar to this:
“sysdiagnose_2017.08.17_07-30-12-0700_10169.tar.gz”

You can report this issue directly to Apple using Feedback (https://www.apple.com/feedback/macos.html)

and

send the file and date/time information to support@anytune.app or use Submit a request.

You could also try to disable GateKeeper:

Disable Gatekeeper from the Command Line

Launch Terminal (/Applications/Utilities/) and issue the following command to turn off Gatekeeper:
sudo spctl --master-disable
Hit return and enter the admin password as required by sudo, and Gatekeeper will instantly be disabled.
Confirm the setting:
spctl --status
This will report back ‘assessments disabled’ to indicate that Gatekeeper has been turned off. You will also find that the Gatekeeper Security preference panel will be set to ‘Everywhere’.

How to Enable Gatekeeper from the Command Line

Launch Terminal (/Applications/Utilities/) and issue the following command to turn on Gatekeeper:
sudo spctl --master-enable

Send us the Extended Attributes for Anytune.app

Open a terminal window and type the command and send us the result.

xattr -lrv /Applications/Anytune.app

This will show us if an extended attribute has been set, and possible a clue.

The xattr command lets you modify or even remove the extended attributes of your apps and files. In other words, this command modifies the complementary information attached to your app or file, also known as metadata.

A number of users solved this issue by running the:

xattr -r -d com.apple.quarantine /Applications/Anytune.app

command in a Terminal window. This command lets you remove the quarantine flag from your app. Double-check to make sure you add the correct path to your app after the com.apple.quarantine string.

Reference

How to Fix App “is damaged and can’t be opened. You should move it to the Trash” Error on Mac