You might want to add that people should also copy the x360ce.gdb file out of that archive along with that dll. That is a database file that will make certain games work since it specifies which ones require hookmask and automatically enables it for them. There are also some games like Super Meat Boy where you need to rename xinput1_3.dll to xinput9_1_0.dll for the game to use the controller emulator.
This list shows games that require it to be renamed.
You can also edit your x360ce.ini and add Version=1 under the [Options] section to stop the error message about the config file not matching.