hi all, 

i desparatly need your wisdome please 

i constantly had to open these large DWG files as part of my work daily. just before opening the file draftsight would always asks me if i want to substitute:

[ LTypeShip.shx ]for [ liscard .shx]

[LTypeShip.shx ] for [ gjc.shx ]

[arsimp shx ] for [ Stylus BT ]

but one day it stopped asking me and every time I try to open the files draftsight will freeze , and says "file not found - liscard.shx" . I have a feeling, I probably pressed 'cancel' instead of 'ok' on the substitution dialog box. 

but now i don't know how to reverse that and I am unable to do my job. please help 

michael