Changing prices does not apply to recurring pricing. That's impossible to do for basically all payment providers as they establish recurring agreements and once a time period (usually like 24 hours) has passed that agreement can't be modified. You would need to cancel their recurring payments within the payment provider so they don't get billed on the next cycle forcing them to manually renew at the new price. For payment processors where CBSubs has to trigger the recurring billing you can modify the subscriptions either in CBSubs > Subscriptions (click # under ID column) or in the database to turn off recurring for them.

We'll be trying to redo a lot of this in CBSubs release for CB 3.x (basically a CBSubs rewrite) as we'll be switching to token billing if possible. Token billing will let us entirely maintain the recurring billing cycle, which will allow price changes during recurring payments. Token billing however will limit us pretty much to Stripe and PayPal exclusively as a lot of older payment processors do not support token billing.

I cannot see this anywhere: CBSubs > Subscriptions (click # under ID column) ??? There is no # in the ID column.

The table is large you'll need to scroll it right. You should see a scrollbar at the bottom of the table.

How would I disable the recurring in the database ??

Since QuickPay uses the internal scheduler you can cancel them in the database by setting the following for their row in the _cbsubs_subscriptions table.

autorenew_type = 0
autorecurring_type = 0

Next for their basket you need to set the following in _cbsubs_payment_baskets.

scheduler_state = (empty string)
scheduler_next_maturity = 0000-00-00 00:00:00

That should completely shut off recurring for that subscription as if it was a manual payment.