You can extend the maximum number of save slots by creating a file at {.../FemUZero_1.2/js/plugins} named {extendSaves.js} with the following content:
JavaScript:
DataManager.maxSavefiles = function() {
return 100;
};
The number after "return" is the total number of save slots(minus 1).
You also need to add a comma at the end of line 35 and then create a new line with the following content at {.../FemUZero_1.2/js/plugins.js}
JavaScript:
{"name":"extendSaves","status":true,"description":"","parameters":{}}
The following image is an example of the before/after
View attachment 3490283