Testcomplete version 6.52 to Testcomplete version 8

we are using Testcomplete version 6.52 and want to switch to version 8.

Please provide us the details and cost required to get Testcomplete version 8.

1) As we have (floating)license for version 6.52 can we upgrade it to Testcomplete version 8?

2) Is that required to get seperate license for it? If yes what is the cost of lincese.