Not too sure what you mean. Is your i-TRiLOGI running properly on your desktop PC? Or you are unable to launch the i-TRiLOGI software on your desktop PC? But you mentioned that you have the software installed on your desktop for sometime so I presume it must be running?
If it doesn't run then it could be due to a Java JRE upgrade on your desktop. In that case please contact support@tri-plc.com with your purchase records (invoice #, vendor's name etc) and we will then send you the download link to download the latest copy of i-TRiLOGI. The good thing about the latest version is that it automatically install the JRE1.4.2_19 and will use it automatically even if your Windows update your Java automatically to newer version.