FEATURE REQUEST: Download Past Subscriptions to Date X

I am using Win version of 4k. Sometimes when 4k is run, it does not catch all of my subscription's updates. Say I haven't ran 4k for a week, so I am expecting 4k to download the last week of videos from my subscriptions... Well sometimes that doesn't happen for whatever reason; sometimes I might close 4k right after opening it, so 4k thinks it has done its job by getting subscription updates, but I have accidentally cancelled those downloads by closing 4k prematurely.

So I'd like to propose this feature: I'd like to be able to tell 4k to ACT AS IF it has not been opened for a week, and to download the last week of subscription updates. So I'd like to be able to "Download subscriptions older than date x."

Thanks