KODI 19 super slow on XFCE

Hello
I’m dual booting an old laptop with Win10 and Manjaro XFCE.
Thing is KODI runs super slow on Manjaro which makes it unusable.
On Win 10 it runs ok keeping in mind the hardware restrictions (3GB Ram) of my 2007 Toshiba.
How can this be since Win10 is much “heavy” to work on?
On Windows I have Kodi 18.9 Leia.
On Manjaro I have the latest 19 Matrix.
On Kodi forum they said the difference in versions in not relevant since the major change was the Python thing.
Any ideias on this? And why this difference in performance?

I would like to install previous version of KODI. How can I install KODI 18.9 Leia? Is there a command for the terminal?

Thanks

Install downgrade from pamac, then try something like this:

sudo DOWNGRADE_FROM_ALA=1 downgrade kodi

Then, choose the version you want

Thank you for your answer Sir.
I tried that and got this:

select a package by number: 20
 kodi-18.9-3-x86_64                              19,2 MiB  2,75 MiB/s 00:07 [###########################################] 100%
 kodi-18.9-3-x86_64.sig                         566,0   B  0,00   B/s 00:00 [###########################################] 100%
loading packages...
resolving dependencies...
warning: cannot resolve "python2-pycryptodomex", a dependency of "kodi"
warning: cannot resolve "python2-simplejson", a dependency of "kodi"
warning: cannot resolve "KODI-BIN", a dependency of "kodi"
:: The following package cannot be upgraded due to unresolvable dependencies:
      kodi

:: Do you want to skip the above package for this upgrade? [y/N] n
error: failed to prepare transaction (could not satisfy dependencies)
:: unable to satisfy dependency 'python2-pycryptodomex' required by kodi
:: unable to satisfy dependency 'python2-simplejson' required by kodi
:: unable to satisfy dependency 'KODI-BIN' required by kodi

Does this happen because I never had KODI 18.9 installed in Manjaro OS (only in Windows) so there’s nothing to downgrade to?

I advice you to read this
https://wiki.manjaro.org/index.php/Downgrading_packages

You can try to install the missing dependencies, the two first should be available in AUR.
Then, you can also try to install another version of kodi