Here is a list of locations for each item in Vegas. To backup when formatting the PC!

⭐ Favorite plugins from: VFX, Transitions and Media Generator:

%USERPROFILE%\AppData\Roaming\VEGAS\VEGAS Pro\Favorite PlugIns
 

⭐ Windows Layouts and Keyboard Map Customized:

%USERPROFILE%\AppData\Roaming\VEGAS Pro\"Version number of your vegas, ex: 18.0, 19.0, 20.0, etc."
 

⭐ General Preferences. Like: ram usage, track color, deprecated feature, auto save time, etc:

Copy the file "persist.prefs" in: "%USERPROFILE%\AppData\Local\VEGAS Pro\"Version number of your vegas, ex: 18.0, 19.0, 20.0, etc." to any folder of your choice to save the preferences. And when you want to restore the preferences just paste the file again in that location.

Or...

To export. In vegas go to: Options>Export Preferences...
To import. In vegas go to: Options>Import Preferences...
 

⭐ Presets from: VFX, Transitions and Media Generator:

My Documents\OFX Presets
 

⭐ Render Templates:

%USERPROFILE%\AppData\Roaming\VEGAS\Render Templates
 

⭐ Scripts:

Vegas built-in scripts:
C:\Program Files\VEGAS\VEGAS Pro "Version number of your vegas, ex: 18.0, 19.0, 20.0, etc."\Script Menu

Ideal location:
My Documents\Vegas Script Menu
(by placing in this folder the scripts work and any version of vegas)
 

⭐ Extensions:

Ideal location:
My Documents\Vegas Application Extensions
 

⭐ Filter Package:

To export. In Regedit go to:

HKEY_CURRENT_USER\Software\DirectShow\Presets\FX Packages

In the left corner of the Window. Right-click the FX Packages folder and click Export. Save wherever you like. To import in the future.

To import: Just double-click the registry entry file in the folder you saved and confirm.

It is also necessary to copy the files from these folders:

%userprofile%\AppData\Roaming\VEGAS\FX Packages

%userprofile%\AppData\Local\VirtualStore\Program Files (x86)\Sony\Prese

*It's not very safe to do it this way, it's better to use the Preset Manager.

Sony Preset Manager 2.0:
https://web.archive.org/web/20160826164938/http://dspcdn.sonycreativesoftware.com/current/extras/presetmngr20k.exe
 

⭐ Project Properties Templates:

VP19 and earlier versions.

To export. In Regedit go to:

HKEY_CURRENT_USER\Software\Sony Creative Software\VEGAS Pro\19.0\Metrics\VideoProProfiles
*Being the version you want to import.

In the left corner of the Window. Right-click the VideoProProfiles folder and click Export. Save wherever you like. To import in the future.

To import into same version of vegas: Just double-click the registry entry file in the folder you saved and confirm.

To import into a version prior to VP19: Right-click the registry entry file in the folder you saved it to and click edit.
On the line where you have:
[HKEY_CURRENT_USER\Software\Sony Creative Software\VEGAS Pro\19.0\Metrics\VideoProProfiles]

Change the version to which you want. (Remembering only versions prior to VP19.)
Save the file. Then just open it normally.
*This procedure can also be done to import pre-VP19 versions to later versions. Being limited up to version 19.

VP20.

To export. In Regedit go to:

HKEY_CURRENT_USER\Software\VEGAS Creative Software\VEGAS Pro\20.0\Metrics\VideoProProfiles

In the left corner of the Window. Right-click the VideoProProfiles folder and click Export. Save wherever you like. To import in the future.

To import into same version of vegas: Just double-click the registry entry file in the folder you saved and confirm.

To import from a version prior to VP20 to VP20: Right-click the registry entry file in the folder you saved it to and click edit. Replace the line where you have:
[HKEY_CURRENT_USER\Software\Sony Creative Software\VEGAS Pro\19.0\Metrics\VideoProProfiles]
For:
[HKEY_CURRENT_USER\Software\VEGAS Creative Software\VEGAS Pro\20.0\Metrics\VideoProProfiles]

Save the file. Then just open it normally.
*This procedure can also be done in reverse to import from VP20 to versions prior to it
 

⭐ Toolbar organization, pan/crop & mask presets, track motion presets, etc:

VP19 and earlier versions.

To export. In Regedit go to:

HKEY_CURRENT_USER\Software\Sony Creative Software\VEGAS Pro\19.0\Metrics\Application
*Being the version you want to import.

VP20.

To export. In Regedit go to:

HKEY_CURRENT_USER\Software\VEGAS Creative Software\VEGAS Pro\20.0\Metrics\Application

In the left corner of the Window. Right-click the Application folder and click Export. Save wherever you like. To import in the future.

To import: Just double-click the registry entry file in the folder you saved and confirm.

*I haven't tested if it's possible to import and export to different versions and vice versa. As I showed with the Project Properties Templates.