CleanMem keeps memory use in check on the system without the memory being pushed to the page file. This in turn keeps the system running smoother. CleanMem itself is totally free. When you install CleanMem it will auto run every 15 min by the Windows Task Scheduler. Once installed it is set it and forget it. Just as it always has been. You can configure CleanMem to do more advanced things such as ignore lists, only lists, and log files. These can be set by the CleanMem Settings program in the start menu.
The Mini Monitor is the only part of CleanMem that is the Free/Pro. All features in the mini monitor from v1.7.0 are included and still free, including some new features that where added as well. The Pro version of the mini monitor is simply extra features, such as tools and information.
One very important thing is that there are no nag screens in the free version of the mini monitor and no pop ups asking you to upgrade to pro or anything like that. So the free version is still as helpful as it was before and the pro version adds more control and options for the power users.