MB can't read nor edit ID3 tags in AAC

[Terepin]

After converting from FLAC to AAC in EZ CD Audio Converter, MB can no longer read nor edit ID3 tags in files. And when I try to edit them, it shows me this:
https://drive.google.com/file/d/0B0GFPMJ7zM7lX2RsZXlfTURyQnM/view?usp=sharing

[hiccup]

Welcome to the forum Terepin,

You'll probably need to give some more info to get specific help with this.
Did you leave the flac files in your library? How did you import the AAC versions?

[Terepin]

I have hole music folder in my library.

Forgot to mention that WinAmp and VLC in my phone don't have problem with them, only MusicBee.

[Steven]

musicbee doesnt support tagging of AAC files. You will need to convert them to .m4a files
If you search the forum you will see utilities mentioned for this task

[Terepin]

Oh, I see. Thanks for clarification. Why it doesn't support it, if you don't mind asking?