4.2.2 Upgrade To 4.3.6 Via Store Import

All goes smooth till last step and then hangs forever

Here is log

2016-05-03 12:43:12: Upgrading to 435
2016-05-03 12:43:12: Importing data
2016-05-03 12:43:12: Importing data
2016-05-03 12:43:12: Updating add-ons
2016-05-03 12:43:12: Running /home/xxx/domains/xxx.com/public_html/436/app/addons/store_import/scripts/addons/paypal_ult_F434T435.php
2016-05-03 12:43:17: Updating data
2016-05-03 12:43:17: Updating data
2016-05-03 12:43:17: Updating data
2016-05-03 12:43:17: Updating data
2016-05-03 12:43:17: Upgrading to 436
2016-05-03 12:43:17: Importing data
2016-05-03 12:43:17: Importing data
2016-05-03 12:43:17: Updating add-ons
2016-05-03 12:43:17: Running /home/xxx/domains/xxx.com/public_html/436/app/addons/store_import/scripts/addons/bestsellers_ult_F435T436.php
2016-05-03 12:43:17: Running /home/xxx/domains/xxx.com/public_html/436/app/addons/store_import/scripts/addons/blog_ult_F435T436.php
2016-05-03 12:43:36: Updating data
2016-05-03 12:43:36: Updating data
2016-05-03 12:43:36: Updating data
2016-05-03 12:43:36: Updating data

Any thoughts?

Tested much but was not able to pass the last step, import hangs in very last step where it should say Done.. Upgrading manually..