This is just a quick, simple tip.
If it takes forever to scan plugins every time you open Live (due to certain poorly-coded plugins taking longer than others and bottlenecking the process), you can set it up to skip plugin scan. Keep in mind that if you do this, you’ll want to perform a manual scan (from preferences) any time you install or update any new VST plugins.
How to do it?
Add “-NoVstStartupScan” to your options.txt file
But how to do that?
To familiarize yourself with Ableton’s options.txt, i will point you towards sonicbloom.net’s awesome article and series of videos on the topic.
/vst-plugin-for-keyboard.html. That’s it! Live will no longer do a scan every time it opens.
Pro Tools First does supports ReWire, though, and that's a big plus because that means it can run other DAWs that support ReWire. It can use Ableton Live's built-in instruments, for example, and if you ReWire with Reaper it can run VST plugins within Pro Tools. Bidule is another option that works with Pro Tools First. Go to the 'Options' menu and select 'Preferences'. Under 'Preferences', select the 'File Folder' menu. Click the 'Browse' button next to 'VST Plug-In Custom Folder'. Select the folder you would like Ableton to use for VST Plug-Ins. Macintosh HD Library Audio Plugins VST If you're using a custom VST folder you need to locate the WaveShell file and move it to your custom VST folder. Then re-launch Live if it's already running. This will scan the Waveshell and activate all available Waves plug-ins in the browser. How to Use the Nexus VST Plugin 1. This is a great video that covers all the basic features and everything you need to know to get started using the Nexus VST plugin.
ReWire Ableton Live into Pro Tools. ReWire Propellerhead Reason into Magix ACID Pro. ReWire PreSonus Notion into Ableton Live. That’s all there is to it. For general information on ReWire, check out the article Upgrade Your DAW with ReWire. In this article, we’ll dive into a specific-use case — how to ReWire Propellerhead Software’s. In the Ableton Live preferences, go to the 'File Folder' tab. Ensure 'Use VST Plug-In Custom Folder' is ON, and click 'Browse' to choose the folder where all your VST plugins are. After that, click 'Rescan' to make sure Ableton Live has refreshed the list of installed plugins.
Ever since i applied this option, the stupidly vast size of my plugin collection doesn’t adversely affect my workflow. Live startup time is way snappier. When i occasionally buy or grab a free plugin, i just run a scan after installing it. Every once in a while you might have to do a “deep” scan (hold alt while clicking the scan button) if something doesn’t show up when it’s supposed to.
Note that from Live 10.1 onward, the plugin rescan button is located in the new dedicated plug-ins tab in Live’s preferences, rather than under file/folder, as previously.
Hopefully this nifty tip is inapplicable to you, as that means your plugin scan is not bloated. However, for those of you that are having issues with slow startup of Ableton Live (or in case it eventually becomes an issue) this may be a viable solution.
There are a few different way to use VST and AU plugins in Pro Tools 12. It’s even possible to use VST/AU plugins in Pro Tools First, the free version of Pro Tools 12.
One of the things that separates Pro Tools from other DAWs is the proprietary AAX format that it uses for plugins.
Not all plugins are available in AAX, especially some really good free ones, so Pro Tools users have to find workarounds to get their favorite VST and AU plugins to work.
Luckily there are a few methods that can get the job done.
Unfortunately none are free, but they all have demos to try for free, and each offers a number of other features as well.

Not all of these options will work with Pro Tools First since one of the main limitations with the free version is you have to get all the plugins through Avid’s marketplace.
Pro Tools First does supports ReWire, though, and that’s a big plus because that means it can run other DAWs that support ReWire. It can use Ableton Live’s built-in instruments, for example, and if you ReWire with Reaper it can run VST plugins within Pro Tools. Bidule is another option that works with Pro Tools First.
Reaper is a good option to use VST plugins in Pro Tools because it has a 60-day free fully-functioning demo and it only costs $60 to purchase. Plus it’s a full DAW and not just a plugin like the other options.
The folks at Pro Tools Expert uploaded the helpful video above showing how to use Bidule with ReWire to load VST instruments into Pro Tools First. Bidule sells for $95 and can be used for a number of other things as well.
Another option to run VST and AU plugins in the full version of Pro Tools 12 is with the Blue Cat Audio Patchwork plugin. It’s capable of hosting up to 64 VST, VST3 or Audio Unit plugins in one instance. It sells for $99 (79 euros).
The Metaplugin is an AAX plugin that can host VST and AU plugins in the full version of Pro Tools. It supports up to eight individual channels and sells for $49.