by RoryOF » Mon Dec 05, 2016 3:33 pm
The processes you are looking for in TaskManager are called "soffice"; notice the initial "s". They are there, but may be running under another User, such as Administrator. If the installation asks you to exit running instances of OO and OO Quickstarter, they are definitely running on your machine.
Apache OpenOffice 4.1.9 on Xubuntu 20.04.1 (mostly 64 bit version) and very infrequently on Win2K/XP