I'm currently using 3.6.15 and I want to load 4.2.6 but still retain all of the incomplete files and be able to resume downloading them using 4.2.6 after it has successfully installed.
What should I do to achieve this outcome ?
Do I just download the 4.2.6 install file and run it ?
Do I have to backup some files, uninstall 3.6.15, install 4.2.6, then copy back the backup files ?

TIA for any assistance.