Notpad++ is a free extremely good text editor. I would not be with out it.
The batch file Clears the localthumbcache.package which can keep a lot of info leftover from removed mods and such or anyway just junk over time it can get quite large bloated with junk that does not even pertain to your game.
Deleting it does not harm a thing as the game will just make a new one and start filling it back up.
Wickwhims.log file is re-writen pretty much every time you reload your game deleting it is not exactly a must do, but I feel better making sure it starts with a clean slate every time I load my game.
to make things simple on you you could just use this part
Code:
echo off
cls
c:
cd "C:\Users\[YOURNAME]\Documents\Electronic Arts\The Sims 4"
del localthumbcache.package
del WickedWhims.log
echo on
That would clear the cache, and then you could start your game with in the regular way.
Just copy and past that script into Notepad++ and save as a .bat file. give it a name like ClearSims4Cache.bat
Or just go to
C:\Users\[YOURNAME]\Documents\Electronic Arts\The Sims 4 and delete the localthumbcache.package file yourself which is what many people do. [ EDIT >>> OR if you're worried move it to some place safe on your desktop, and that way if you have a problem put it back ]
It is a good idea to do that anyway every few days of playing and I think a really good idea when swapping around or adding, and removing Mod's a lot.
If it worries you to much to tamper with stuff, don't do it, I have been tweaking things one way or another for a long time, so what feels easy for me might not be for you.
But you might Google Sims 4 Cache removal, and get some better information. It is something you should understand better was a really big bugger in sim's 3.