Retain Misys IP address between installs

I have added a check in the installer to retain the Misys IP address between installs. It checks both the trial folder if it exists and the full version folder, good for those upgrading from the trial. There is also a check for the .ini file for those upgrading from the trial. Previously the .ini file would have to be manually backed up and then imported after upgrading.

Version 1.2.9b