I was prompted to take a quick look at Texture Paint Helper 1.3 aka texturepainterhelper. Long marked as “Unavailable” at Renderosity. No videos though there is a helpful short user-guide, and the software itself has a step-by-step workflow built in.
If you want to see if you have it archived somewhere, the DAZ Studio installer was DS3_TexturePaintHelperLoader_18.104.22.168_Win64.exe (possibly DAZ 3 only) and it was ps_ap204b_TexPaintHelper.exe for Poser. Windows only. I find I have a copy of the latter installer. Re-installs and runs fine for me. Works with any Poser figure, is not restricted to a base V4 or just DAZ figures.
It doesn’t appear to be a re-texturer / re-painter as such, but an overlay-builder (think ‘tattoos’, ‘body-paint’) which lets you use regular Photoshop to do the painting of the overlay. There may be better tools now. I guess 3D Coat, and I recall many used Blacksmith3D at one time, and a simple node setup in the Material Room can also work with any Poser version, and don’t overlook that Poser 11 had new Material Room features in that regard. But it’s nice to know that ye olde standalone desktop software dedicated to working with a Poser runtime can still run. It only requires the ../content folder and not access to Poser, so does not require a specific Poser version due to scripting etc. It knows about Poser runtime structures and presents these quickly and well.
Pitterbill in Texture Paint Helper, 2022. A fine use of structured workflow with incorporated buttons for the user.
No drag-and-drop from its loader library, over to the Poser stage. Lack of drag-drop or any keyword-search means it can’t be re-purposed for use as an alternative Library. Still, if someone can access the source code today, there seems no reason those features could not be added.