Nine - 4.9.1c

• Updated the Google Payment Library.
• Fixed the problem that didn't show message bodies in the iCloud account.
• Fixed the issue that some text has broken in some IMAP accounts due to encoding error.
• Fixed the calendar issue that some events exported to the system calendar have disappeared intermittently.
• Fixed UI error that didn't show the day of the week correctly in the Day/3Days/Week view. 
• Enhanced the rich editor functionalitiesby and large.
  • Fixed the problem that the line spacing becomes too large space-out, and the text color changes when you "copy & paste."
  • Fixed an error that occurred when replacing a signature. 
  • Fixed an issue where the top of the mail was cut off when adjusting the zoom.