For Houdini 19.0

From here you can install the add-on manually.

Drop VEX.sublime-package file into Data/Installed Packages

Example:
C:\Users\teared\AppData\Roaming\Sublime Text\Installed Packages\VEX.sublime-package

Then follow the rest of the readme, including optional setup sections.

Release 7.1.7

1. Updated for Houdini 19.0.

2. Documentation popups changes:

   Display version tag for the functions added in the last few versions of Houdini.
   Provided by the documentation, so it is not always present.

   Remove random & messy function tags.

3. New VEX functions added:

   agentchannelcount
   agentcollisionlayers (deprecates agentcollisionlayer)
   agentcurrentlayers (deprecates agentcurrentlayer)
   agentmetadata
   chiang
   decodeutf8
   encodeutf8
   mx_cellnoise
   mx_perlin
   ramp_pack
   replace
   replace_match
   setagentcollisionlayers (deprecates setagentcollisionlayer)
   setagentcurrentlayers (deprecates setagentcurrentlayer)
   usd_flattenediprimvar
   usd_flattenediprimvarelement
   usd_iprimvar
   usd_iprimvarelement
   usd_iprimvarelementsize
   usd_iprimvarindices
   usd_iprimvarinterpolation
   usd_iprimvarlen
   usd_iprimvarnames
   usd_iprimvarsize
   usd_iprimvartimesamples
   usd_iprimvartypename
   usd_isabstract
   usd_isarrayiprimvar
   usd_isindexediprimvar
   usd_isiprimvar
   usd_ismodel
   usd_setvisibility
   usd_specifier
   volumecubicsample
   volumecubicsamplev
   volumesmoothsample
   volumesmoothsamplev

   Tip: to read about new functions quickly, copy the list in empty
   Sublime Text document, set VEX syntax and check documentation helpcards.