Due to licensing issues OLA is not supported directly at the moment. Me best advice Would be to keep your OLA Installation and add an E1.31/sACN device for the same universe. Then select sACN as bridge Type in OH2.
Ok, here we go. Most of this informatioon can be found here.
This assumes you already have configured OLA and the output device (your USB DMX adapter) is working.
Please enable sACN (in ola-e131.conf set enabled=true, restart OLA.
Issue ola_dev_info from the command line. You should see (at least) two devices, the previously configured output device (which is already patched to an universe) and the sACN/E1.31 device. The latter one should have several ports, some labelled IN and some OUT.
Take the universe configured for your output device universe, the device number of the sACN device device and the number of an input port port and use these to issue ola_patch -d device -p port -u universe.
Issue ola_dev_info from the command line again. You should see selected port patched to the same universe as the output device. You’re done with configuring OLA.
There you go. Now add a sACN bridge (preferred via Paper UI), select Transmission Mode to be multicast (that should be the default) and use the same Universe as above.
If something is not working as expected, please post the output of ola_dev_info. Thanks.