If you have denied the access to the keychain and want to change it now, use the following steps:

  1. Close SimpleumSafe
  2. Start the “Terminal” Program
  3. Enter “security delete-generic-password -l worksparse.sparsebundle”
    in Terminal and press enter
  4. Start SimpleumSafe again. Now you will be prompted again to allow access to the keychain. Confirm with your Mac system password.