Total memory is showing less than the required. So my recommendation is to redeploy to the "small" version of the collector. Because even if you fix it to work temporarily this problem will reoccur with frequency, I did not see your response of the Vmware ESxi host software version.
I think for a deployment the only thing you need essentially to export is the credentials and the list of managed devices then you should be able to redeploy. Just in case just power off the original redeploy a new image and if needed to return to the old one you can. If not after the redeploy you can delete it. the selection of the resources of the appliance occur on the same file install for all types.
export device list : page 8 chapter 3
export credentials: page 2 chapter 6 (is not on the headers but the button is just beside the import one)
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