It is unclear, but it appears to me that the clause you uploaded deals with the property division part of the divorce decree. If that is the case, then you can file a motion to clarify any ambiguity; but not a motion to modify the decree. The general rule on post-judgment modification of divorce decrees is that modification is not permitted. A New Hampshire court explained it this way:
"A property distribution in cases of divorce and separation creates vested rights upon which the parties are entitled to rely in starting and planning a new and different life. It is, in effect, an assignment of assets, however modest or extensive, reflective of the efforts of the parties and the considered judgment of the equity court in arriving at a degree of parity called fairness. Such judgments are made, as are judgments in the business world generally, upon reflection of the prevailing economic climate as well as the vicissitudes of economic times. Although, in appropriate cases, non-economic considerations may come into play . . . the great weight of considerations in most cases is economic. For this reason, in marital cases, as in the business world, modification of interests thought to be vested is not permitted[.]
McSherry v. McSherry, 135 N.H. 451, 606 A.2d 311, 313 (1992).
The courts have held that an ambiguous judgment can always be clarified. As long as the court only determines the effect and meaning of the prior decree, and does not change that effect or meaning, the rule against modification does not apply.