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Expert Adviser can't load ... again

Hi, I'm getting the following error when I try to load my paid for EA. 2019.01.07 01:33:07.291 cannot load 'C:\Users\Administrator\AppData\Roaming\MetaQuotes\Terminal\24C15973512615D323580867D7656EA5\MQL4\Experts\Market\xxxxxxxxx.ex4' The only way I know to fix this is to delete the EA and reinstall

how to get 90% Model quality on M30 and up

I followed the instructions given in few sites, which basically consist of making your mt4 offline, deleting old history, downloading m1 history, importing it, converting it to m5, m15, m30, h1, restarting. My problem is that for m15 i'm getting model quality of 90% but m30 and upwards is giving me