For Houdini 17.5

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 3\Installed Packages\VEX.sublime-package

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

Release 7.1.1

1. Updated for Houdini 17.5.

2. New VEX functions added:

   agentclipchannelnames
   chid
   choplocal
   choplocalt
   decode
   encode
   has_udim
   opid
   orthographic
   perspective
   prerotate
   prescale
   pretranslate
   quaterniontoeuler
   solveconstraint
   solvecurve
   solveik
   volumeindexactive

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

3. Existing VEX functions' new signatures:

   agentsolvefbik(geometry, outgeo, prim, targets, targetxforms, xformgroup, iters, tolerance, pinroot)
   agentsolvefbik(geometry, outgeo, prim, targets, targetxforms, xformgroup, iters, tolerance, pinroot, targetweights, targetpriorities, targetdepths)
   ch(op_id, parm_index, vector_index)
   ch(op_id, parm_index, vector_index, time_in_sec)
   chf(op_id, parm_index, vector_index)
   chf(op_id, parm_index, vector_index, time_in_sec)
   chv(op_id, parm_index)
   chv(op_id, parm_index, time_in_sec)
   maketransform(xyz, angles)
   optransform(op_id)
   rotate(m, angles, xyz)
   uvdist(geometry, primgroup, uvname, uv, prim, primuv)
   uvdist(geometry, primgroup, uvname, uv, prim, primuv, maxdist)
   uvintersect(geometry, primgroup, uvname, orig, dir, pos, primuv)
   uvsample(geometry, primgroup, attr_name, uv_attr_name, uvw)