In your TWS install directory (e.g. C:\IBJts), there is a directory corresponding to an encrypted version of each username that you log into TWS with (e.g. darykq). In that directory, you may want to copy some or all of the following files to the same directory (after you have logged in and back out again) on the new machine:
jts.pg - Market data pages and lines
user.ini - Most configuration settings, including some stuff related to pages.
layout.lyt - Page layouts
exec.lyt - Executions window layout
option-model.xml - Option model info
???.rpt - Execution files for the last 7 days