[Trisquel-users] Trisquel 8 mini upgrade stalling

[brashley46]

Hi ...
I have tried the upgrade-via-software-updater repeatedly, and it refuses to  
get beyond telling me I can't because I have software from other sources  
installed. This makes no difference when I am installing an update to xUbuntu  
on my desktop; as Trisquel is also debian-ubuntu based I have no idea why  
this occurs. I have filed a bug but nobody is answering it.
My old EeePC is the platform I want to install on, it runs Trisquel Mini 7  
with no problem. At the moment, the old machine does not even want to boot up  
from USB stick and install that way.
Do I really have to uninstall Calibre, Megasync, Dropbox, etc., and reinstall  
after the upgrade?