You're exactly correct, I tagged the version that compiles against Samba 4.0-4.4 as v0.1, which is the one that you've provided the tarball link to already. v0.2 compiles against Samba 4.5, which was changed enough so that the previous version had no hope of compiling as it was.
The short version is that yes, it's possible. The longer answer is that as Samba development progresses, it's becoming increasingly difficult to maintain in its current form, anyway, and that a better approach (as already suggested) is to extricate it from Samba itself and use Samba libraries, which is a larger task, but I can't guess offhand whether that's larger or smaller than reverting to Samba3 -- but I can suggest that it's likely to garner more support as CIFS continues to evolve and Winexe...
I have to admit I'm not clear on the precise definition of "winexe-static" (I can certainly figure out the broad outlines, of course.) Is it simply a static build? Which distro/architecture/packaging system? (Perhaps some of that does not matter?)
For anybody who compiles from source, I forked it and hacked together a fix. Source...
Cleanup of debug stubs
Stability fixes
A little more sane debug routines, not as verbose
Set debug to default 0