If you have some develping skill you can write your own psdata interface.
the file format is not too compicated
But the prefferred way is to let picotech provide some sort of API, for example only working when there is a pico scope connected to the pc.
Then they know for sure the software is used with their hardware.
This way you can capture the data with the API on higher sample rates, or longer timespans, than picoscope now supports.
And then analyse the data with picoscope software.
This problem https://www.picotech.com/support/topic16751.html
can easaly be solved if the OP had a way to write psdata files with the API.