I prefer AOMEI, but whatever... ¯\_(ツ)_/¯
NIUBI Partition Editor Pro installs either the 32-bit or 64-bit version of the app, along with 2 generic files [one a driver] that I've seen used by several programs of this sort. Neither file [MDA_NTDRV.sys & nb-fre.exe] is installed in the C:\Windows\ System32\ Drivers\ folder, but just in System32 -- that could *potentially* cause problems if a different version of MDA_NTDRV.sys was already registered in the Drivers folder. If you run a copy of the app that has not been installed, it will install those 2 files in that copy of Windows. Otherwise the only files added are a copy of the license file to the Windows folder when you activate the software, and any shortcuts, e.g. on the desktop. While it appears to function portably, the installation of those drivers means that it Is Not a true portable app, which by definition should not leave anything behind on the host copy of Windows.
Not everything you might do with a partitioning app can be performed with Windows running. Typically a WinPE compatible version of the software will be bundled with a basic copy of WinPE that's either written to a bootable USB stick or copied to the hard drive to be run after a restart -- either way you're running WinPE & not your full copy of Windows, which allows you to do pretty much anything to the hard disk(s). Nowadays, with the mix of Legacy, Compatibility mode, & UEFI BIOS used by all the different Windows devices, booting to a USB stick can be a problem. NIUBI Partition Editor Pro avoids that part of it, only providing an ISO you can use to boot the device & run the WinPE version of the app. Burned to an optical disc, most of the devices that actually have an optical drive will revert to legacy mode when booting from it. Used with something like the free Rufus to create a bootable USB stick, Rufus takes on the hard part, and the responsibility, making sure that USB stick is bootable -- and if not, it's Rufus' fault. Rather than download WinPE from Microsoft [they won't let anyone else distribute it] NIUBI Partition Editor Pro, like many similar apps, uses the recovery files normally installed with Windows. If you have more than one Windows device, and they're running a mix of Windows versions, if you want to create one bootable USB stick for more than one device, create that USB stick using the ISO from the latest version of Windows... they're backward, but Not forward compatible.
Working with PCs etc. sh** happens... and if it happens while you're trying to work with your hard disk partitions, you could be in a world of hurt. Backup beforehand to be safest [or take the risks, & lumps if something bad happens]. Because I've got a partition image backup handy, I'll restore that backup exactly where I want it rather than moving the partition, which can be a slight bit more work that can take longer.