Installed kdenlive twice using apt then flatpack, terminal and software app telling me different version? Why?

First I installed Kdenlive using apt-get intall kdenlive, this installed version 17.12.3

Knowing some features're not available, I was gonna upgrading Kdenlive using flatpak, using following command:

sudo apt install flatpak
flatpak remote-add --if-not-exists flathub
flatpak install --from 

This successfully installed kdenlive version 19.12.3

Question:

1. When I run kdenlive -v on terminal, it says 17.12.3, but when I opened kdenlive and go to help->about it says version 19.12.3, so did I have two kdenlive version installed?

2. If yes, how can I remove the older one? sudo apt-get remove kdenlive?

3. Was the correct way to upgrade software ver? How to properly upgrade if they belong to different repo/package manager?

P.S: still a linux noob

1 Answer

1. When I run kdenlive -v on terminal, it says 17.12.3, but when I opened kdenlive and go to help->about it says version 19.12.3, so did I have two kdenlive version installed?

   Yes. You first installed version 17.12.3 using apt, then installed version 19.12.3 using flatpak.

2. If yes, how can I remove the older one? sudo apt-get remove kdenlive?

   Yes. Simply run the following command to remove the older (apt) version:

   sudo apt remove kdenlive

3. Was the correct way to upgrade software ver? How to properly upgrade if they belong to different repo/package manager?

   No. That's not the correct way to 'upgrade'. As hinted before apt and flatpak work independently. You can install two instances of the same application using these package managers.
   To update packages installed using apt, run

   sudo apt update && sudo apt upgrade

   To packages installed using flatpak, run

   flatpak update