Good to hear that it runs fine now, even though it's weird that it didn't before.
As far as installing goes, I find most programs to be easier to install than in Windows and getting them updated, because the update manager handles them centrally in one place.
The first place to look if you want to install a program is the software-center. That is the most straight-forward and safest option. There you just click on install, type in your password and it is installed.
The second easiest are .deb packages. If you have one, double click on them and it will open the software-center and you can install them as above.
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