How can I de authorize Digital Editions of an old computer to allow me to load a new computer

[ajjt1966]

Old computer does not have a de authorize button (old version of Digital editions) how can I reset it to allow me to load a new computer

[dominic_michael]

Switch to Library mode, by clicking the Library button or Ctrl+L. Then press Ctrl+Shift+D to bring the Erase Authorization dialog.