Step 5: Exit and Restart Thunderbird again. Let the process finish and, after that click on ' Install Now' button. xpi file that you previously downloaded in Step 1 and click on ' Open' button. Step 4: In this step, you need to browse.
Step 3: Click on Icon Gear » Install Add-on From File. Step 1: Download Add-on ' ImportExportTools' from Mozilla Official website: So, it is better to use this utility for exporting data to Thunderbird.
Mozilla has declined to give support for Eudora OSE/ Penelope Add-on.
So, if you used this Open Source Edition of Eudora and now finding some application to import all the data of Eudora OSE to Thunderbird then, you are on right place because Turgs Eudora Wizard helps you to convert all the data in desired file format. The reasons may be vary (bugs, performance issues, security issues etc) but there is no installer available at Qualcomm site for using it (**Which simply indicates that Eudora OSE is no longer available). Qualcomm is no longer developing Eudora OSE, an Open Source Edition that combines Mozilla's thunderbird from Qualcomm's Eudora.
