the new update of MT4 1340 does not allow me to operate properly with my EA. Can I use the previous version of MT4 to continue operating? for example with version 1320?
What do you mean by "operate properly" ? What is in the logs ?
This isn't really a solution, but I'd suggest to move on from MT4, learn Mql5. Because MT4 has very limited support, mostly from the mql5 community (not anymore from Meta Quotes) . So the sooner you move on to the future, the sooner your problems can be fixed.

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Hello, the new update of MT4 1340 does not allow me to operate properly with my EA. Can I use the previous version of MT4 to continue operating? for example with version 1320? Can you send me a download link or send me the MT4 version 1320? I wouldn't want to update it. You can also send me with this email address: Harold.graells@cmail.cat