Mine is 2.5. I've been slightly misguided by the review on the product page saying Madeira X Evo requires P3Dv.2.5 too and by a little hope that even if it's not 100% exact, the scenery would work perfectly like any other P3Dv3 scenery I have does (Rome, Menorca, Malaga Stuttgart, etc). Anyway, I (kind of) managed to get the lines displayed combining MKSTUDIOS_MADEIRA and MKSTUDIOS_MADEIRAfsx folders in C:\ProgramData\12bPilot\SODE\SimObjects and copying some textures from the MadeiraX2016\