Adobe tackled raw files from Fujifilm's X-Trans sensors and did not do well at first. Some people say that finally Lightroom is more or less okay now.
You can get reasonably large (4 to 7 MB) JPGs from the APS-C-sized X-Trans cameras like the XE-1, plus a raw file. There are many easy ways to save the JPG, then open it in PWP.
The Fujifilm Raw File Converter is a restricted variant of Silkypix. The workflow does not need to be complicated. Once you know where the control window is, you work down its short list of adjustments: exposure, white balance, contrast, optional film color simulation and other color modes, sharpness and noise reduction. Ignore most of the secondary sliders under each of the items on this list. Ignore the toolbar across the top of the window.
Watching the histogram, I generally adjust exposure, white balance, and contrast to avoid clipping. This usually means a low level of contrast. Then I do the real work on an exported 16-bit TIFF.
Currently, I experiment with one of den's techniques for saturation (raise HSV-S curve near the high end, holding it fixed or at lesser increase near the low end) by using a diagonal or inverse diagonal brightness mask. I also run the TIFF file through Raw Therapee for its LAB curves; a couple of simple curves can do amazing things to pop colors without extreme saturation.
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