First off does MAME run games outside of Hyperspin on your new computer.
Secondly about the organisation, first try to use parent ROM settings when you set up MAME as this will have less game as the clones won't be visible.
To further reduce the games you will eventually be able to use 'Collections' but as the software is beta that feature is not implemented yet.
You seem to be perfect to try the beta as long as you realise it is still early and I'm sure HS 2 is very functional if you just want a few systems to start with.
It's also good for you to start learning from scratch.
Most other systems will use Retro arch which I recommend you look at some setup videos on.
HS2 will guide you and is much easier to set up than HS1.
I got over this by closing the app from the task manager and then open it again. Worked 1.33 and should be the same with the version in the download section.
Welcome back Spawk the (still) moderator, great to have back. Lots to catch up with and if you would like your old account sorted then drop us a support ticket or send me a DM.
Before Rocket launcher there was only Hyperspin which had a modules folder for .ahk scripts to go.
Then Rocket launcher came along with its own ahk scripts and if you have a Rocket launcher folder in your Hyperspin folder then RL scripts will be used. The default should be for Rocket launcher to be you default launcher this is set in the settings.ini file in your HS folder but shouldn't need to worry about that.
Most of your Rocket launcher setup should be done in RocketLauncherUI if you're a novice. Under the 'Modules' tab for MAME is where you will find those MAME ini settings. Hopefully you've managed to do it via the ini as suggested by jesfknkrys.
Welcome to the world's most beloved mascot, good to see you taking a break from opening other people's packages and wacking off Goombas.
Have fun, it's great to have you here.
P.S. Keep to the speed limit and no blue shells.
If it's not then that will definitely be added at some point. Currently the Devs are working on the theme builder which is looking amazing and so are the themes produced by the artists.