When you say it didn’t work properly, did you mean
1.It was the wrong size
You say it was 100 x 100mm, but the dimensions in the program indicate 200 x 200
Your geometry is wrong, fix the geometry.
2.It was feeding too slowly
Line N170 F3.6 is 3.6 mm per minute
It would take 55 minutes to go 200 mm
The feedrate is set on the “TOOL” page in Mastercam X5
3.The depth is wrong
You say you went 10 mm deep, but line N160 makes a rapid move to Z-15. and line N170 feeds to Z-20.
The depth and feed plane are set on the “LINKING PARAMETERS” page in Mastercam X5
4.You wanted the tool to be centered on the lines
It looks like cutter compensation (handled in the computer by Mastercam) is on. That shifts the tool ½ the diameter so the cut will leave the line.
Compensation type and direction are set on the “CUT PARAMETERS” page in Mastercam X5
5. You didn't want to use tool number 219
The tool number can be set on the "TOOL" page in Mastercam X5
Let me know if it's something different that's not right, but I don't think there is anything wrong with the post processor