Mac OS told me Ireal Prwas damaged and to delete - now wants me to purchase new copy?

[DolphinDan]

Hi, when I went to use IReal Pro a message told me the programme was damaged and to delete and reinstall. I uninstalled the app. Now, when I go to the App Store it wants to charge me £19.99 to purchase it again. Surely that's not right. Has anyone else had this problem?

[dflat]

We assume you purchased from the Mac App Store originally? If so, please check what Apple account you are signed in with, and which account you used to purchase the app:
https://support.apple.com/en-us/118212
You also would have had a receipt from Apple, check which account purchased it.

If you still have the problem, Reboot.
You can contact Apple to check their end (the App Store, your account purchase etc.)