Computer usage is changing. People are now using several operating systems on their machines and may own several devices. Many people have Linux installed and run a virtual machine of XP or newer OS to run their windows apps. They may keep an XP VM around to run older apps that are having trouble with Win 8. Installing an application several times, once for every OS VM is time consuming and troublesome and violates EULA's. It's easier to install the app once onto an external drive in a portable form with all it's configuration files in the local directory and then it is available to any OS VM that is started on the computer. People upgrade their computers every couple years and now days they may have installed over 100 applications that need to be migrated to the new machine. Personally, I have owned nearly 30 machines in the last 20 years and have installed my applications hundreds, maybe thousands of times. I'M DONE!!!! From now on I install a portable copy on the Passport external and let the application upgrade itself when it runs. If I change my OS (which I have done 3 times in the last month) or buy a new computer I will NOT reinstall my 100+ apps ever again. No more... Done wasting my precious time reinstalling apps every year which can take an entire week of nights getting the apps to where they were before I bought the new machine. Lastly, you have a competitor that provides an anti-malware product that is beating Malwarebytes on detection rates regularly over the last 9 months and THEY provide a portable version. I've been relying on their product the last 6 months and Malwarebytes has been sitting unused. If you all wish to continue fighting the trend and not provide a portable product that is your choice and it's a poor business choice....