As of now the devs killed the modding community, maybe by mistake but that mistake was with a .50BMG sniper rifle
it'll take a lot of time to fix it and some quit so i'm posting this to quell the folly of it all for the moment
it's not simple but we can do it:
-put this link on your browser to access your steam console: steam://nav/console
-insert "download_depot 285920 285926 5796941714856594366"

-get theses files, once downloaded in steam/steamapps/content/(gibberish) it's named "depot(gibberish)"

-MAKE A BACKUP OF YOUR FILES on a new folder where you like, in case you blow it
-copy that file in that backup folder in a separate one than that backup and name it "1.3.5" (not needed but good to remember what is what)

-copy/paste the contents of that file into your "common/terratech" folder and overwrite it
-now you have 1.3.5 on terratech! if you want to get back to the older one just take the backup
REMEMBER TO SAVE YOUR MODS SECURELY BEFORE DOING IT OR YOU'LL BE ERASING IT BY MISTAKE
REMEMBER TO INSTALL TerraTech ModLoader AFTER THAT
Many thanks and credits for BeastMan for telling me how to do that, i'm just repeating what he told me.
it'll take a lot of time to fix it and some quit so i'm posting this to quell the folly of it all for the moment
it's not simple but we can do it:
-put this link on your browser to access your steam console: steam://nav/console
-insert "download_depot 285920 285926 5796941714856594366"

-get theses files, once downloaded in steam/steamapps/content/(gibberish) it's named "depot(gibberish)"

-MAKE A BACKUP OF YOUR FILES on a new folder where you like, in case you blow it
-copy that file in that backup folder in a separate one than that backup and name it "1.3.5" (not needed but good to remember what is what)

-copy/paste the contents of that file into your "common/terratech" folder and overwrite it
-now you have 1.3.5 on terratech! if you want to get back to the older one just take the backup
REMEMBER TO SAVE YOUR MODS SECURELY BEFORE DOING IT OR YOU'LL BE ERASING IT BY MISTAKE
REMEMBER TO INSTALL TerraTech ModLoader AFTER THAT
Many thanks and credits for BeastMan for telling me how to do that, i'm just repeating what he told me.