I need to Cancel DL of 2.0.0.10

Earlier I tried to update Portable FF and the SL just sat there (I waited ten minutes and Nata) so I exited Portable started Local version and DL the complete version then installed that to USB. Restarted Portable FF the Compable check was done and PFF started but I saw that PFF was trying to install the update still then got message that it did not work and the complete version would be DL and then the install would be done well when I go under help I see were the 2.0.0.10 is still trying to dl and PFF the real real slow to respond; I think the dl of the complete version is slowing down every thing and as I already have 2.0.0.10 installed and running I need to Cancel that install but I can't get to it to cancel it; any suggestions.

After being plugged in at home since 5PM yesterday at 2PM today it finally finished the DL then it took two hours to install but looks like it's finished updating and no more dl.

alls OK now!