Then why is there a download at all? I downloaded the 64 bit SUSE compatibile version, there has to be a way to install it.
There is, just not the way that you tried…
Does everything i install have to come from YaST, or can i download packages from some sites and install them myself (assuming they’re compatibile with SUSE)? Cause i’ve seen some programs that YaST search didn’t find, and i found the packages available for download on some internet sites…
Well, nothing comes from yast. Yast is a front end that allows you to install things. To oversimplify (I’m assuming that you don’t want to deliberately make things hard for yourself) you can choose yast or the command-line Zypper. I’d say that Yast is easier to learn, but there is a Zypper way of doing this, if you’d prefer that.
If SuSE has a repo for it, whatever it is, the easiest is just to add the repo to your list and everything will happen automagically, including SuSE doing whatever anti-malware checks that they do, provided that you go into yast occasionally and check. This is the best way of doing things, if it works.
If the software supplier has their own repo, you could add that, but you lose out on the advantage of SuSE’s checking. This may not be a big disadvantage if you think that the supplier is reputable and competent and they have a reputation to protect which will cause them to be sufficiently careful.
If the supplier only makes a compatible .rpm available, you could make your own repository in a local directory on your hard disk. This has the additional disadvantage that there are no automatic updates. If there is an update and it fixes security problems, how soon would you get to know and what impact might it have if you had an app with a known security vulnerability?
(If you did this, you would manually download the package to the designated directory and use ‘yast > install software’ to install it.)