UPDATE INSTRUCTION:
The following files has been changed in version 4.8

1. assets/css/admin.css
2. assets/css/store-v2.css
3. assets/css/store-v2.css
4. assets/js/admin.js
5. assets/js/k_mapbox.js
6. assets/js/merchant.js
7. assets/js/store-v3.js
8. assets/js/store.js
9. protected/components/Ajax.php
10. protected/components/AjaxAdmin.php
11. protected/components/Functions.php
12. protected/components/FunctionsV3.php
13. protected/components/Widgets.php
14. protected/config/main.php
15. protected/config/table_structure.php
16. protected/controller/AdminController.php
17. protected/controller/AjaxadminController.php
18. protected/controller/AjaxController.php
19. protected/controller/AjaxmerchantController.php
20. protected/controller/MerchantController.php
21. protected/controller/StoreController.php
22. protected/controller/UpdateController.php
23. protected/vendor/KMapbox.php
24. protected/models/view-receipt.php
25. protected/views/admin/settings-new.php
26. protected/views/admin/social-settings.php
27. protected/views/admin/theme-settings.php
28. protected/views/front/browse-list.php
29. protected/views/front/menu-header.php
30. protected/views/front/order-history.php
31. protected/views/front/search-list-1.php
32. protected/views/front/search-list-2.php
33. protected/views/layouts/admin_tpl.php
34. protected/views/merchant/bank-deposit-verification.php
35. protected/views/merchant/settings.php
36. protected/views/store/add_review.php
37. protected/views/store/bankdeposit-verify.php
38. protected/views/store/browse-resto.php
39. protected/views/store/deposit-verify.php
40. protected/views/store/index.php
41. protected/views/store/menu.php
42. protected/views/store/payment-option.php
43. protected/views/store/profile.php
44. protected/views/store/receipt-front.php
45. protected/views/store/receipt.php
46. protected/views/store/search-results.php
47. protected/views/front/favorites-list.php - NEW FILE
48. protected/views/store/driver_signup.php - NEW FILE
49. protected/views/store/driver_signup_ty.php - NEW FILE
50. protected/views/store/error_payment.php - NEW FILE

DATABASE

1. new fields(dinein_table_number) added in _order table
2. new table called _favorites

Run the db update example http://bastisapp.com/kmrs/update