[Gambas-user] Gambas v3.10.0 setup problems again

[mikeB]

eGreetings - the World of Gambas,
If using v10 to develop and package an install file - does gb.qt4
need to be used and distributed (as opposed to gb.qt3)?

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If so -
if the end user had several apps developed with Gambas 3.8.?
installed, and working, will those apps be disabled due to
a setup installing gb.qt4 (as I think it un-installs qt3
in the process)?

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Note: I'm having users of any of my apps install Gambas
v.10 runtime files via the following terminal commands before
install of any of my apps:
sudo add-apt-repository ppa:gambas-team/gambas3
sudo apt-get update

Is there a better way?

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Are the v10 runtime files backwards compatible with v8?
In my mind = they don't seem to be.

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Thanks for any/ all help in resolving this issue - I'm
finding that creation of the setup file and compatibly
issues are harder to understand then the actual
coding/ dev of the app ;-(

Have a GREAT day,
mikeB