Open or view log files

We are using AdventNet_ManageEngine_NetFlowAnalyzer_4_windows trial version. How can I open log file to see the historical usage of network traffic and the second question there is a file under "C:\AdventNet\ME\NetFlow\mysql\data" named "ibdata1" and its size 174 MB, how can we open this file, is this file is a log file or something else?

one more.. we can take reports but at once we configure to show top10 Results, two days ago we changed the settings uo to top100. But for historical uage reports we can only take Top10 results. Can we see the other usage from previous records.

Please send the answer immediatelly.
Thanks in advance.