New here, and when it comes to computers, Im pretty much in the dark ages still.
Anyways, I use SU2015 and was considering 2019. I really cant afford to buy the program and now SU make is available online only? Meaning you need to be connected online to even use it?
For hobby use like yours there are two options. You can use SketchUp Free which is browser based or you can use SketchUp 2017 Make which is desktop based.
The browser version requires an internet connection to get it open although once it is open, you only need the connection for saving back to the web or accessing the 3D Warehouse.
I’ve opened SketchUp Free on my computer and then unplugged the modem so there’s no internet connection and then proceeded to spend an hour or so modeling. No problems at all. Autosaves can’t be made so you have to remember to save manually sometimes.
There are a number of benefits to the web version that make it at least something to investigate. You can run it even on cheapo computers like Chrome Books or you could run it on a friend’s computer or on a school computer and access your models without installing the desktop version. You get the most recent version every time you open it, too. I expect as a hobbyist user you would find it satisfactory.
The web version does not allow you to customize toolbars or use plugins and extensions.
SU2019 is a desktop version. It will allow you to customize toolbars and you can use extensions and plugins but if you have no intention of buying the license, there’s little point spending time setting it up. Better to go to SU2017 Make.
If you are using it for more than just a hobby, though, you would need SketchUp Pro and 2019 is the current pro version.
There are numerous bug fixes since 2015. Those happen every year. The 3D Warehouse no longer supports versions older than 2017. There’s a tray arrangement for the utility panels that was added in 2016 or 2017 (I forget which) .
If you are going to install it, make sure you do it correctly. That requires logging into Windows as you normally do, right clicking on the SketchUp installer and choosing Run as administrator. If you install it any other way, it will be wrong.