1) Remove existing license (remove license) so it can be installed again on a different computer
2) Install software on new server, apply license (from the register button or under global settings - register).
3) Exit Core FTP Server (stop service if running).
4) Transfer over settings
Move these to the new machine after install:
CoreFTPServer\config.dat -- (location will vary, you can retrieve the current location from the global settings).
The server data (config.dat) may alternatively be in the AppData or ProgramData directory, you can find the location in the global settings.
If moving from 32-bit to 64-bit, log file locations may need to be edited. Do not use the global logging option except for during setup.
Alternatively settings can be moved over first to confirm the new server is running correctly, and then the license transferred after.