How to read a log file with extn. *.log (in Valvenet Technologies datafeed)

[blackpearl]

I subscribed to valvenet technologies to try the datafeed for a month. It is not so satisfactory. needs improvement.They generate a logfile each hour as a text Document (Reports until 10.log)under Logs directory. Anyone who is using valvenet datafeed, knows how to read that logfile . which tool is to be used to read such log files.

Thanks in advance.