Hi,
Set the folder means set the location where you put these results. To set a new default output directory run LPS and go to Options > Preferences and it is the first option at the top.
Then Click File -> New -> Query and put the following conditions to new query and choose the log type:
SELECT TO_LOWERCASE(Client-Software) as Software, Client-Software-Version,
EXTRACT_SUFFIX(client-name,0,'=') as User,
TO_REAL(SUBSTR(TO_STRING(MUL(PROPCOUNT(*), 100.0)), 0, 5)) as Percent
FROM '[LOGFILEPATH]'
WHERE Software IS NOT NULL
GROUP BY client-software, Client-Software-Version, client-name
ORDER BY Percent DESC
Best Regards.