Studio One Pro v 3.5.2 bugs

After updating to Studio One v 3.5.2 +, I have noticed a lot of issues, which seem primarily to effect existing sessions from v. 3.5 and earlier. The master fader track is missing from the arranger window, and is not available in the 'show / hide' side bar. There seems to be no command to make new master bus or 'show in arranger'. The copy and paste function does not work for automation. Some FX chaels appear as Bus chaels when opening sessions. The effects presets I have saved, including new 'default' presets, have reverted back to Presonus defaults. This includes presets I had made after updating to v. 3.5.2, So I can only assume that some aspect of some session files is not being updated and is referencing some previous version? In my Projects, the 'update mater file' works inconsistently, and the 'apply all meta data' function only works if enter the data in the first track. Is there some way to force Studio One to rebuild all of it's support files.