Right click the shortcut to Stranded Deep
Select Properties, then Open File Location
Navigate to C:\Program Files (x86)\Stranded_Deep_x64\Stranded_Deep_x64_Data\Data\Experimental
There'll be a folder in there with a long number for it's name, maybe a few.
Open the one with the most recent Date Modified stamp
Inside there will be one file with the same name as the folder and the file extension JSON
Open this file in notepad.
Press ctrl + F to get up the find dialog and search for PlayerMovement (note there's no spaces in that name)
There should be a block of code around player movment like this:
Change the Y value to a positive number like 2 (in this example mine is already set to 2)
Save the file.
Start up Stranded Deep and selected to Continue your game. You should be in the same spot just about 2 feet off the ground.