If all you're doing is changing the Engage Distance, you could just fix it through Notepad.

Run the replay through Notepad, and go to this line:

NEWGAME 0;500 10 15 0 0 2 300 0 0 classic 0 0 100 0 0 0 1 0 2 0 0 0 0 0 0 0.000000 0.000000 -30.000000 0 0 0 0 8

The underlined and bolded number is the Engage Distance in the line. Change that number to whatever Engage Distance you want, and delete ALL of the POS lines.

Also Enikesha has been broken for quite a while now. If you want to fix the Engage Distance, Self Damage, Gravity, etc. you could just fix it on Notepad. You just need to learn where their numbers are on the NEWGAME line.