After transfer to another realm few addons broke
 

Itemrack and trinket menu settings resetted for transfered char. Trying to find a way to fix it through editing wtf files. Prob just realm name somewhere but where?

You'll have to go into your WoW client's folder, then "WTF\Account\<AccountName>". You should see a list of servers, in those will be the list of characters. Just move whatever folders represent the characters from the old server to the new one. Note the new server folder may not be there unless you've logged on it at least once.

As usual, you need to be logged out before moving the files or the game will overwrite them.

I deed exactly that. The thing is I think those addons store setting with realm-charname inside files so just put those settings in correct directory is not enough i need to edit realm in file somewhere.

If the addons have in-game configuration, see if they have a section for "Profiles" and if so maybe you can switch the new realm characters profile to the old one.

Other wise in the WTF\Account\[your account]\SavedVariables\[addon name].lua file you might find something like

You should be able to change the RealmName (save a copy or two of the file before changing it).

I also thought TrinketMenu's SavedVariables were per character but it's been a while, ItemTack even longer.

I figured even though I copy pasted in empty folder, some files been copied but appeared empty. So when I log inthe game it get default values from addon and thats it. If I manually open it in text editor and paste old settings it works.
But why it happening. It not the first time on this system for me this happening. Something about access policy I dunno.