virtualbox.org

When I first download virtualbox on fedora 26 I installed it via GUI and now I need to update it, and of course when I type yum update VirtualBox it dosen't work out
so I tried to update it by the same way I installed it and when I do that it says:
Unable to install "Oracle VM VirtualBox":
Error running transaction:file /usr/bin/VBox from install of VirtualBox-6.0-6.0.10_132072_fedora26-1.x86_64 conflicts with file from virtualBox-5.2-5.2.16_123759_fedora26-1.x86_64"

It maybe will work if I deleted VirtualBox and Installed it again but I don't want to delete my stuff

Completely remove/uninstall/delete/purge what you have right now, and install the official version from the Linux Downloads section of VirtualBox. You can even add VirtualBox as a repository, so you could use your traditional install/upgrade/uninstall tools.

Your VMs/Settings are not going to be touched during this procedure, as long as you uninstall just the program related files, and not your "data" or your settings...

And how can I add virtualbox to fedora repository so when a new update comes out, I can do yum update VirtualBox
sorry for asking these stupid questions but I am new to linux

I am wondering about this as well

Follow the link to the "Linux Downloads" page socratis has provided above and read the last section of that page.

well I did what you told me but I don't think I have deleted the old files, I tried "#dnf remove VirtualBox-5.3.11-200.fc28.x86_64.x86_64" and it deleted bunch of other files
but when I did "#dnf search Virtualbox"
I found "kmod-VirtualBox-5.3.11-200.fc30.x86_64.x86_64" and bunch of other things similar to it which I believe is related to the default system
anyways I ignored it and started the process for installing the new version in which I followed these steps at this website https://www.tecmint.com/install-virtual ... ora-linux/
, one of these steps was to do
"#dnf update"
so I did it and I think it restored the old files that I deleted previously
so all I am asking is how to delete/uninstall the old version completely without deleting default packages/files
and how can I keep my virtualbox up to date without redoing this process again
basically tell me what to type