You just need java installed. You go to the itch.io page and download the release of the data conversion tool. And you run the program, you select the data folder you want to convert and it will convert. Than you can use a dbbrowser of your liking, for beginners maybe a simple dbbrowser for sqlite a bit of google search might help as well.
With little to no knowledge of SQL one can view the entire database. One of the features I like the most is the ability to export this data into a .xls.
So running a query like "SELECT * FROM workers where wage < 3000;" will list all the workers that are under 3000 dollars which is great for backyard to global games. One can get further with it Select name, striking, flying, wtv you want to see from workers join contracts on contracts.worker_id = workers.workerID WHERE contracts.promotion_id = the id of your promotion; which will list all the workers from your company you can then select that and export to .xls or just copy the table and raw paste to excel or google docs. Its a pretty nasty tool. I could make a list of useful queries but one can learn easily and there are a lot of sql tools around that can help the user with the complex query builders made simple and work more like a visualizer than anything else. If you don't want to mess with queries, just click on the column to sort by the column, can be useful to filter out some results, to get the highest brawler based wrestler or the wrestlers with the higher overness without all the scrolling and clicking you need to do in EWR.
So far I only encontered an issue with the roster splits, where the only the odds id are being converted, 1, 3, 5, 7... So in my 2007 save game I had to manually copy paste the smackdown roster but it was a lot better than writing all the stats by hand, just to then close the window because my spreadsheet loving part was done with EWR.