Unfortunately I don't see how to reuse the work file on a different range.
This work file is for [2^114,2^115-1].
If you translate the kangaroos, the paths will differ so you have to redo all the job.
You can (see here ->
https://bitcointalk.org/index.php?topic=5244940.msg54546770#msg54546770) but it's not worth it.
You have computed about 2^58.36 steps. And you know now the private keys of 2^33.36 DPs in the [1, 2^114 - 1] interval (why you said [2^114,2^115-1]?)
In theory, to have 50% to get a collision in the #120 search, if you reuse the 300GB of DPs you need to do other 2^61.70 steps (only wild).
If you restart instead from scratch, you need to do about 2^61 steps.