* Fixed assert on ImGui on IBrowser because ImGui::Begin wasn't followed up by ImGui::End
* FileExists got modernized. Using std library instead of Windows native functions now.
* RTech::DecompressedSize is actually readable now thanks to steyk.
* Same goes for RTech::Decompress
* rtech_decompress prints the decompressed file CRC32 now and writes the file all at once.
* Fixed ImGui assert on spamming SetupImGui();
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