STATA 11 & 13 incompatibility

Hi

I have been using STATA 11 on my personal machine and stat13 on my work machine, and never had problems until now. I ran some updates (which i admit i hadn't done for a while due to mostly using a work machine for STATA) and now do not have the option to import a text data (CSV) file. I have also saved some data from the work computer (STATA 13) under both a dta file and tried the option for STATA 12 data and STATA 11 won't recognise either format.

Below is the error message:

use "E:\gamlss delta CUR\gamlss normal data_clean_v1_160719.dta", clear
file E:\gamlss delta CUR\gamlss normal data_clean_v1_160719.dta not Stata format
r(610);

any suggestions?