File list (Check if you may need any files):
RESINVM3D
.........\DCdriverBH.m
.........\DCdriverS.m
.........\LinSolve
.........\........\bicgstb.m
.........\........\ipcg.m
.........\........\matsol.m
.........\........\precg.m
.........\MatsFD
.........\......\Asol.m
.........\......\ATsol.m
.........\......\calcGv.m
.........\......\calcGvT.m
.........\......\div.m
.........\......\dMassf_dm.m
.........\......\grad.m
.........\......\massf.m
.........\Misc
.........\....\boundary_correction.m
.........\....\calcRHS.m
.........\....\calcWTW.m
.........\....\cell_centre.m
.........\....\data_weight.m
.........\....\driverplot.m
.........\....\interpmat.m
.........\....\interpmat_N.m
.........\....\kron3.m
.........\....\mkvc.m
.........\....\Qtu.m
.........\....\Qu.m
.........\....\updateMTX.m
.........\ModelData
.........\.........\Borehole
.........\.........\........\ActiveCells.mat
.........\.........\........\ActiveCells.txt
.........\.........\........\DataFile.mat
.........\.........\........\DataFile.txt
.........\.........\........\dx.txt
.........\.........\........\dy.txt
.........\.........\........\dz.txt
.........\.........\........\GrdFile.mat
.........\.........\........\ModeWtFile.mat
.........\.........\........\ModeWtFile.txt
.........\.........\........\MrefFile.mat
.........\.........\........\MrefFile.txt
.........\.........\........\RecFile.mat
.........\.........\........\RecFile.txt
.........\.........\........\SrcFile.mat
.........\.........\........\SrcFile.txt
.........\.........\........\SynModel.mat
.........\.........\generateMTX.m
.........\.........\sort_src.m
.........\.........\Surface
.........\.........\.......\ActiveCells.mat
.........\.........\.......\ActiveCells.txt
.........\.........\.......\DataFile.mat
.........\.........\.......\DataFile.txt
.........\.........\.......\dx.txt
.........\.........\.......\dy.txt
.........\.........\.......\dz.txt
.........\.........\.......\GrdFile.mat
.........\.........\.......\ModeWtFile.mat
.........\.........\.......\ModeWtFile.txt
.........\.........\.......\MrefFile.mat
.........\.........\.......\MrefFile.txt
.........\.........\.......\RecFile.mat
.........\.........\.......\RecFile.txt
.........\.........\.......\SrcFile.mat
.........\.........\.......\SrcFile.txt
.........\.........\.......\SynModel.mat
.........\Optimize
.........\........\InvMainN.m
.........\RESINVM3D_readme.doc
.........\RESINVM3D_readme.txt