This is honestly a new version of PSPLINK :)
What's new? Added a command to change a thread's priority, updated the cp command so you no longer need to retype the filename when copying, usbhostfs should now return correct error codes (wrapped errno) on failure. usbhostfs should no longer allow you to open directories as files, added some initial VFPU instruction disassembly, added a power off command, added a new feature into usbhostfs to auto convert backslashes to forward slashes and finally various fixs and tweaks too numerous to note.
Get it from the usual place, PSP/TOOLS.