In class LogCollectorEmail.java you have the method : sendMail(FileLogger logger, File tempLogFile)
This method will be collect the log, and at the end call onLogCollected(File path, String mimeType) who will send the log.csv to the share intent. (and the intent will be handle by the system).
The is no option of export file type.
At first a HTML option using the same colors as the logcat will be very useful.