Loading a Previously Planned Mission in S/W Version

Can someone confirm whether a not a mission planned with a previous version of Mission Planner (.17 I believe) will fly/load correctly in a new version Mission Planner (running .25 now)?

In other words, I planned a mission last fall (older MP verions) and flew yesterday (Version 1.3.25) with unfavorable results.

just download the mission in MP, and then reupload it. depending on what the mission had in it it should work.