Are you using Windows or Mac? What is the OS version? What's the version of Extension Manager after you updated? When does Extension Manager quit? Does Extension Manager quit during startup? or quit during installing extension? Please provide more details to help us troubleshooting. You can also generate log files, refer to http://forums.adobe.com/message/4275082#4275082.
Sorry for the lack of info.
Mac (3.4 GHz Intel Core i7)
OS X (10.8.2)
Adobe Extension Manager CS5.5 <= Quits on start up. I double click the .zxp file and it launched extension manager for about a second and it immediately quits.
I suspect Extension Manager hasn't been updated actually. Please select "/Applications/Adobe Extension Manager CS5.5/Adobe Extension Manager CS5.5.app" in the Finder then check the version displayed in the preview pane or right click it and select "Get Info" to open info dialog. Make sure the version is 188.8.131.52. If the version is 184.108.40.206 indeed, Please paste the Mac crash report or log file here.
Thank you so much for taking the time to assist me so far. I had some extra time during the weekend, so I continued my research and stumbled upon another posting from someone that had the same issue (but apparently provided more info) and had received a response with a link to update extension manager. I ended up following that link and reupdating my extension manager, which made everything work.
Just in case someone else has the same issue and ends up in this forum thread, the link that I used to update my extension manager is: http://download.macromedia.com/pub/dw_exchange/extension_manager/mac/A dobeExtensionManager_5_5_3_mul_AdobeUpdate.dmg
Yes, Extension Manager 5.5.3 in mac can be download from
http://download.macromedia.com/pub/dw_exchange/extension_manager/mac/AdobeExtensionManager _5_5_3_mul_AdobeUpdate.dmg. Actually, all updates of Extension Manager and other products can be got from http://www.adobe.com/downloads/updates/.