Enterprise Browser licensing - version 2.0 vs. 1.8


I just want to ask, as per the PMB-10086, SW-ENTBR-AND and SW-ENTBR-WIN were discontinued and replaced with SWA-EB0SA00-0D01 and SWA-EB0SW00-0D01.

Last book/ship date for the above mentioned PNs were 15th DEC 2018.

Do the new part numbers entitle us to install/use Enterprise Browser v2.0 only, or can we downgrade this license to 1.8?

Version 2.0 is not yet tested with our application and we need to use v1.8 – but as far as I can understand it now, it is not possible to purchase a 1.8 license.