The steps you are using are correct for View 5.0 and below, as of View 5.1 we switched to using the Windows certificate store. Either follow the new documentation from the start or import the p12 file you've already created into Windows. The latter can be done by following the below steps:
1. mmc, open the certificates snapin for the local computer account
2. under personal\certificates, right click and select import
3. select the .p12 file you've created
4. enter the required password, make sure the checkbox for the key to be exportable is selected
5. right click on the new certificate, change its properties and add the 'vdm' friendly name
6. remove the friendly name from the generated self-signed certificate or delete it entirely
7. remove the locked.properties lines you had before
8. restart the service