How many computers can I install UCCNC on?

There really is no limit, you just need to make sure you have the license file for the UC100 parallel to USB interface installed on each computer in the C://uccnc folder.  The limitation is not how many computers you can install it on, it’s the fact that you can really only “use” it on the computer that has the UC100 connected to it.  So if you have 5 computers with UCCNC installed, you would have to move the UC100 from computer to computer and connect to the CNC in order to use that computer.  The software is linked to the UC100 hardware.