»My merge options are gone (oversetting, indirect light, direct light...) is disabled also my option to save to WEB, can anyone help me?«
Could you please post screenshots to clarify what you mean by »opções de mesclagem«?
Regarding the Save for Web-issue: What have you done for all-purpose trouble-shooting so far?
Restoring Preferences after making sure all customized presets like Actions, Patterns, Brushes etc. have been saved might be a good starting point:
https://helpx.adobe.com/photoshop/using/preferences.html
https://helpx.adobe.com/photoshop/kb/basic-trouble-shooting-steps.html