is U-Mix Control pro2 lock(only can use on one PC)?

Hi, i just bought U-Mix Control pro2 and it include with Cross DJ software. I already install the software on my laptop and it work perfect also done updating all update.
Then i install the software on my home desktop. Software can be open fine but i cant use with my U-Mix Control Pro 2 with the software on my desktop also It kept saying (ERROR WHILE OPENING, saying other processed use the device. Abit confuse with the alert actually. Which device does the software means? I tried every suggestion on this forum but still cant fix this problem.
Does this control have limit or lock from using other computer? I had read the FAQ and told the software serial can be use with two computer. How about the control?
If u guys had same problem and solve it please do share.
Then i install the software on my home desktop. Software can be open fine but i cant use with my U-Mix Control Pro 2 with the software on my desktop also It kept saying (ERROR WHILE OPENING, saying other processed use the device. Abit confuse with the alert actually. Which device does the software means? I tried every suggestion on this forum but still cant fix this problem.
Does this control have limit or lock from using other computer? I had read the FAQ and told the software serial can be use with two computer. How about the control?

If u guys had same problem and solve it please do share.