Don't panic... you don't say if your DAP is working... I suppose it is... which is good and can be even better.
1.- It's absolutely normal that your device delete all was in there, as firmware have replaced that one that cames installed. This is a dirty Chinese distributors trick that delivers a cd with non-corresponding firmware
2.- That version of firmware 00.01.0007 doesn't support external speaker.
3.- Have your buttons acting differently than original?... for instance to reach option you cover upper button instead of lower one?
3.- If your device is still working after all this problems... then you can have better news... maybe you can start installing Teclast firmwares. For Omega V88 should be Teclast C260 posted here by me.
If this is the case you'll be a very lucky person because Teclast firmware adds more functionalities to your DAP, delivering upgrades frequently
... but with NO external speaker
If you like back your external speakers reinstall the software provided by lattesurf.
If you don't... go for the Teclast stuff which have more support than any other rockchip DAP inlcuding a nice fansite:
www.teclasters.com
Let us know what you have choose