Notes - Display Problem after importing from Evernote

Notes - Display Problem after importing from Evernote

Hello, 

i just imported all my evernote notes to ZOHO-Notebook, worked great. The problem is, that some og the notes the text formating is wrong. some of the are black background, white text etc. and i can change that in the editor ??? is there a way to maybe reset all note to just b/w text ? 

THX,
GIO