Set arg x for xklb db path

[deldesir]

Fix: #248

[holta]

Is this PR truly needed, and if so why?

• "Parameter Pollution" (i.e. soft-coding of variables / flags / options prior to a proven need) is so often tempting but... far too often creates maintenance burdens down the road... rather than helping a broad demographic?

• Conversely, if the need for another parameter is in fact very real, for a specific QA/Community demographic or any other, then let's please all help articulate that in coming days. (Either Way!) And if the need is confirmed truly real — let's explain why parametrization is genuinely necessary here (e.g. justifying the inevitable ~ additional maintenance/testing/security burdens) ensuring we avoid Complexity Bloat...

[Premature Generalization, like...] Premature Optimization is the Root of All Evil —Donald Knuth (1974)

[deldesir]

Parametrization is not necessary nor needed. KISS principle.