You are posting in the Earlyaccess area of the forum Earlyaccess is for testing new releases before they go into production. You would have to specifically switch to this branch if you wanted to participate in testing, but you probably don’t.
For using the regular production updates, the latest ARC version for you in the App Store is ARC build 170. Apple has been slow to release this one due to some snag, but it should be available now. This is the announcement for this latest production update:
Should be available now, go to the App Store to check:
Earlyaccess is for testing new releases before they go into production. You would have to specifically switch to this branch if you wanted to participate in testing, but you probably don’t.