Hi! I would like to report a bug that I noticed in the beta version. On raspberry Pi 4b, using Mupen64plus Rice I noticed performance loss compared to version 7.2.2, goldeneye is slower.
Another thing I've noticed in other versions is that if I change the default installation core in the settings menu, I can't use that core in the individual configuration for games anymore.
Sorry my english is not my native language. Thanks in advance!
Hello everyone! I finally figured out why Fmsx did not show up. I did a clean install and the problem really was in that. I then compared the two installations, and realized that in my previous installation there was the file called "es_systems.cfg" which I think was broken. After the clean installation everything worked out. Fmsx now appears to change. 
Thanks to everyone who posted on the topic, and for all the help! Thank you! Sorry for my English.
@paradadf Thanks for the reply! I'm going to do the installation cleanly, and then check if the emulator appears fmsx. much thank you for the help!: D
@paradadf I downloaded it from another site in which it compiled the official image of Recalbox version 18.03.30. I downloaded it because I already had all the games included in several systems. But I already did two updates online for the own recalbox, so I think that even if the image was not official, after updating online it would be official.
@paradadf Thank you so much for checking! Unfortunately for me does not appear, even following what you said. I'll show you pictures of how it appears to me.
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@paradadf I checked here, I changed the two parameters, but Fmsx is not available. Could you look and confirm if Fmsx appears to you? In msx here only the Bluemsx core appears. thanks in advance!
@paradadf I tried to change the core to fmsx, but it is not available. the only one available to use is bluemsx. Thanks for the reply.
@aciddreamer Thanks for the reply! I'll wait for the next update. I thought the problem was only with me. thank you so much! : D
Hello everyone! Sorry for my English. I have a problem with my recalbox. After updating the recalbox to version 18.06.27, the MSX system games no longer work. I already tried to change the bios but it did not work. Is anyone also having trouble running MSX system games after upgrading? Colecovision games, with bluemsx core is running normal. Thanks in advance!